uu.seUppsala universitets publikationer
1234567 1 - 50 av 974
rss atomLänk till träfflistan
Permanent länk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
  • Lundberg, Linnéa
    et al.
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Samhällsvetenskapliga fakulteten, Institutionen för informatik och media.
    Natalie, Stevendahl
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Samhällsvetenskapliga fakulteten, Institutionen för informatik och media.
    Konstruera organisationens anseende: En kvalitativ studie om hur svenska organisationer i livsmedelsbranschen försöker påverka sitt anseende via sin kommunikation på sociala medier.2017Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Abstract

    Location: Uppsala University Level: Bachelor thesis in Media and Communication Studies

    Number of pages: 56

    Method: The method used in this thesis is a qualitative interview study.

    Title: Affect your reputation! A qualitative study on how Swedish companies in the food

    industry try to influence their reputation through their specific communication on social media.

    Aim: The overall aim with this study is to understand how organizations in the food industry

    try to influence their reputation through communication on social media.

    Theories: The theoretical perspective of the study is organizational reputation and reputation

    on social media.

    Main results: The result from the interview study shows that organizations in the food industry

    are not communicating in the same way, contrariwise there are some common factors between

    the organizations in their way of influencing the reputation. The common factors are measured

    through the temperature on the separate organization’s users through media sourcing,

    communicating in a transparent and credible way and responding quickly to users. Furthermore,

    the result shows that each organisation find its own way of communicating on social media to

    influence their reputation on social media in their daily communication work.

    Keywords: Reputation, social media, food industry, Facebook, communication

  • Dvirnas, Albertas
    et al.
    Lund Univ, Dept Astron & Theoret Phys, Lund, Sweden..
    Pichler, Christoffer
    Lund Univ, Dept Astron & Theoret Phys, Lund, Sweden..
    Stewart, Callum L.
    Lund Univ, Dept Astron & Theoret Phys, Lund, Sweden..
    Quaderi, Saair
    Lund Univ, Dept Astron & Theoret Phys, Lund, Sweden.;Chalmers Univ Technol, Dept Biol & Biol Engn, Gothenburg, Sweden..
    Nyberg, Lena K.
    Chalmers Univ Technol, Dept Biol & Biol Engn, Gothenburg, Sweden..
    Muller, Vilhelm
    Chalmers Univ Technol, Dept Biol & Biol Engn, Gothenburg, Sweden..
    Bikkarolla, Santosh Kumar
    Chalmers Univ Technol, Dept Biol & Biol Engn, Gothenburg, Sweden..
    Kristiansson, Erik
    Univ Gothenburg, Chalmers Univ Technol, Dept Math Sci, Gothenburg, Sweden..
    Sandegren, Linus
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för medicinsk biokemi och mikrobiologi.
    Westerlund, Fredrik
    Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden.
    Ambjornsson, Tobias
    Lund Univ, Dept Astron & Theoret Phys, Lund, Sweden..
    Facilitated sequence assembly using densely labeled optical DNA barcodes: A combinatorial auction approach2018Ingår i: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 13, nr 3, artikel-id e0193900Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The output from whole genome sequencing is a set of contigs, i.e. short non-overlapping DNA sequences (sizes 1-100 kilobasepairs). Piecing the contigs together is an especially difficult task for previously unsequenced DNA, and may not be feasible due to factors such as the lack of sufficient coverage or larger repetitive regions which generate gaps in the final sequence. Here we propose a new method for scaffolding such contigs. The proposed method uses densely labeled optical DNA barcodes from competitive binding experiments as scaffolds. On these scaffolds we position theoretical barcodes which are calculated from the contig sequences. This allows us to construct longer DNA sequences from the contig sequences. This proof-of-principle study extends previous studies which use sparsely labeled DNA barcodes for scaffolding purposes. Our method applies a probabilistic approach that allows us to discard "foreign" contigs from mixed samples with contigs from different types of DNA. We satisfy the contig non-overlap constraint by formulating the contig placement challenge as a combinatorial auction problem. Our exact algorithm for solving this problem reduces computational costs compared to previous methods in the combinatorial auction field. We demonstrate the usefulness of the proposed scaffolding method both for synthetic contigs and for contigs obtained using Illumina sequencing for a mixed sample with plasmid and chromosomal DNA.

  • Vanky, Kristin
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi.
    Miljökrav på solceller: En utredning om koldioxidutsläpp från kristallina kiselsolceller2018Självständigt arbete på avancerad nivå (yrkesexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This master thesis is an investigation of environmentalsustainability of photovoltaic (PV) modules. The purpose is toexamine how purchasers of PV systems could put requirements on themodules so that their life-cycle carbon dioxide emissions reduces inthe most effective way. The purpose is also to survey environmentalthird-party certifications for solar modules. Only mono- and multicrystallinesilicon modules are considered. In the first part of thethesis, the carbon dioxide emissions from the manufacturing andtransportation of different modules are calculated. Furthermore, thesolar electricity production is simulated in the software PVsyst. Modules with different peak power capacity, origins and manufacturedwith different techniques are compared. In part two, recyclingtechniques and regulations for management of end-of-life-modules areinvestigated. The number of end-of-life modules based on Solkompaniet Sverige AB´s historical installations are estimated and out of these, their potential economic value, based on two different recyclingscenarios, is calculated.

    According to the results, monocrystalline modules cause higheremissions than equivalent multi-crystalline from the samemanufacturer. Modules with the same peak power and silicon but withdifferent origins and silicon manufactured with differenttechnologies, produce about the same amount of electricity, but showa large variation in carbon dioxide emissions, mainly due theelectricity consumption and the characteristics of the electrical mixused in the manufacturing process. The modules’ operating time inaddition to prerequisite conditions for mounting are crucial for theemissions per produced kWh electricity, contrary the transports havevery little effect on the total emissions. Carbon dioxide emissionscould be reduced through re-usage of elements from recycled end-oflifemodules, particularly aluminum and silicon, but economic factorshinder this today, mainly due to too few end-of-life modules. Silveris the most expensive element in a module. The value of end-of-lifemodules will decrease by decreasing silver content, but overallincrease due to increased waste volumes. The future economic value ofend-of-life modules is hard to estimate, but could be crucial for thepossibility to take advantage of the environmental benefit fromtreatment of end-of-life modules.

    In order to reduce carbon dioxide emissions from solar modules,requirements should be directed towards the module manufacturingprocess. This thesis emphasizes prerequisites expected to give loweremissions, hence modules that are more likely to cause lowerenvironmental impact than others. To be able to develop specificrequirements, more transparent and reliable energy consumption datais necessary. It exists very few, and no Swedish environmentalcertifications specifically designed for solar modules. The rankinglist Solar Scorecard is not a certification but seems to be the mostused in order to demonstrate manufacturers' environmentalperformances.

  • Disputation: 2018-06-14 13:15 room 80101, Uppsala
    Jorner, Kjell
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - Ångström.
    Influence of Aromaticity on Excited State Structure, Reactivity and Properties2018Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    This thesis describes work that could help development of new photochemical reactions and light-absorbing materials. Focus is on the chemical concept "aromaticity" which is a proven conceptual tool in developing thermal chemical reactions. It is here shown that aromaticity is also valuable for photochemistry. The influence of aromaticity is discussed in terms of structure, reactivity and properties. With regard to structure, it is found that photoexcited molecules change their structure to attain aromatic stabilization (planarize, allow through-space conjugation) or avoid antiaromatic destabilization (pucker). As for reactivity, it is found that stabilization/destabilization of reactants decrease/increase photoreactivity, in accordance with the Bell-Evans-Polanyi relationship. Two photoreactions based on excited state antiaromatic destabilization of the substrates are reported. Finally, with respect to properties, it is shown that excited state energies can be tuned by considering aromatic effects of both the electronic ground state and the electronically excited states. The fundamental research presented in this thesis forms a foundation for the development of new photochemical reactions and design of compounds for new organic electronic materials.

    Delarbeten
    1. Unraveling Excited-Singlet-State Aromaticity via Vibrational Analysis
    Öppna denna publikation i ny flik eller fönster >>Unraveling Excited-Singlet-State Aromaticity via Vibrational Analysis
    Visa övriga...
    2017 (Engelska)Ingår i: Chem, ISSN 24519294, Vol. 3, nr 5, s. 870-880Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Summary

    The concept of excited-state aromaticity is receiving much attention in that completely reversed aromaticity in the excited state (so-called aromaticity reversal) provides crucial insight into photostability, photoreactivity, and its application to the photosynthetic mechanism and photoactive materials. Despite this significance, experimental elucidation of excited-state aromaticity is still unsolved, particularly for the excited singlet state. Here, as an unconventional approach, time-resolved IR (TRIR) spectroscopy on aromatic and anti-aromatic hexaphyrin congeners shed light on excited-singlet-state aromaticity. The contrasting spectral features between the Fourier transform IR and TRIR spectra reveal the aromaticity-driven structural changes, corroborating aromaticity reversal in the excited singlet states. Our paradigm for excited-state aromaticity, the correlation of IR spectral features with aromaticity reversal, provides another fundamental key to understanding the role of (anti)aromaticity in the stability, dynamics, and reactivity in the excited singlet state of π-conjugated molecular systems.

    Nationell ämneskategori
    Organisk kemi
    Identifikatorer
    urn:nbn:se:uu:diva-349223 (URN)10.1016/j.chempr.2017.09.005 (DOI)
    Forskningsfinansiär
    Vetenskapsrådet, 2015-04538
    Tillgänglig från: 2018-04-23 Skapad: 2018-04-23 Senast uppdaterad: 2018-05-16Bibliografiskt granskad
    2. Triplet state homoaromaticity: concept, computational validation and experimental relevance
    Öppna denna publikation i ny flik eller fönster >>Triplet state homoaromaticity: concept, computational validation and experimental relevance
    2018 (Engelska)Ingår i: Chemical Science, ISSN 2041-6520, E-ISSN 2041-6539, Vol. 9, nr 12, s. 3165-3176Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Cyclic conjugation that occurs through-space and leads to aromatic properties is called homoaromaticity. Here we formulate the homoaromaticity concept for the triplet excited state (T1) based on Baird's 4n rule and validate it through extensive quantum-chemical calculations on a range of different species (neutral, cationic and anionic). By comparison to well-known ground state homoaromatic molecules we reveal that five of the investigated compounds show strong T1 homoaromaticity, four show weak homoaromaticity and two are non-aromatic. Two of the compounds have previously been identified as excited state intermediates in photochemical reactions and our calculations indicate that they are also homoaromatic in the first singlet excited state. Homoaromaticity should therefore have broad implications in photochemistry. We further demonstrate this by computational design of a photomechanical “lever” that is powered by relief of homoantiaromatic destabilization in the first singlet excited state.

    Ort, förlag, år, upplaga, sidor
    The Royal Society of Chemistry, 2018
    Nationell ämneskategori
    Organisk kemi
    Identifikatorer
    urn:nbn:se:uu:diva-349228 (URN)10.1039/C7SC05009G (DOI)
    Forskningsfinansiär
    Vetenskapsrådet, 2015-04538Wenner-Gren StiftelsernaKungliga Vetenskapsakademien
    Tillgänglig från: 2018-04-23 Skapad: 2018-04-23 Senast uppdaterad: 2018-05-03Bibliografiskt granskad
    3. Energetics of Baird aromaticity supported by inversion of photoexcited chiral [4n]annulene derivatives
    Öppna denna publikation i ny flik eller fönster >>Energetics of Baird aromaticity supported by inversion of photoexcited chiral [4n]annulene derivatives
    Visa övriga...
    2017 (Engelska)Ingår i: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 8, artikel-id 346Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    For the concept of aromaticity, energetic quantification is crucial. However, this has been elusive for excited-state (Baird) aromaticity. Here we report our serendipitous discovery of two nonplanar thiophene-fused chiral [4n]annulenes Th4COT Saddle and Th6CDH Screw, which by computational analysis turned out to be a pair of molecules suitable for energetic quantification of Baird aromaticity. Their enantiomers were separable chromatographically but racemized thermally, enabling investigation of the ring inversion kinetics. In contrast to Th6CDH Screw, which inverts through a nonplanar transition state, the inversion of Th4COT Saddle, progressing through a planar transition state, was remarkably accelerated upon photoexcitation. As predicted by Baird’s theory, the planar conformation of Th4COT Saddle is stabilized in the photoexcited state, thereby enabling lower activation enthalpy than that in the ground state. The lowering of the activation enthalpy, i.e., the energetic impact of excited-state aromaticity, was quantified experimentally to be as high as 21–22 kcal mol–1.

    Nationell ämneskategori
    Kemiteknik
    Identifikatorer
    urn:nbn:se:uu:diva-333965 (URN)10.1038/s41467-017-00382-1 (DOI)000408375700010 ()
    Tillgänglig från: 2017-12-13 Skapad: 2017-12-13 Senast uppdaterad: 2018-04-23Bibliografiskt granskad
    4. Cyclopropyl Group: An Excited-State Aromaticity Indicator?
    Öppna denna publikation i ny flik eller fönster >>Cyclopropyl Group: An Excited-State Aromaticity Indicator?
    Visa övriga...
    2017 (Engelska)Ingår i: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 23, nr 55, s. 13684-13695Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    The cyclopropyl (cPr) group, which is a well-known probe for detecting radical character at atoms to which it is connected, is tested as an indicator for aromaticity in the first * triplet and singlet excited states (T-1 and S-1). Baird's rule says that the -electron counts for aromaticity and antiaromaticity in the T-1 and S-1 states are opposite to Huckel's rule in the ground state (S-0). Our hypothesis is that the cPr group, as a result of Baird's rule, will remain closed when attached to an excited-state aromatic ring, enabling it to be used as an indicator to distinguish excited-state aromatic rings from excited-state antiaromatic and nonaromatic rings. Quantum chemical calculations and photoreactivity experiments support our hypothesis; calculated aromaticity indices reveal that openings of cPr substituents on [4n]annulenes ruin the excited-state aromaticity in energetically unfavorable processes. Yet, polycyclic compounds influenced by excited-state aromaticity (e.g., biphenylene), as well as 4n-electron heterocycles with two or more heteroatoms represent limitations.

    Nationell ämneskategori
    Organisk kemi
    Identifikatorer
    urn:nbn:se:uu:diva-332141 (URN)10.1002/chem.201701404 (DOI)000412193700021 ()28683165 (PubMedID)
    Forskningsfinansiär
    Wenner-Gren StiftelsernaVetenskapsrådet, 2015-04538
    Tillgänglig från: 2017-10-24 Skapad: 2017-10-24 Senast uppdaterad: 2018-04-23Bibliografiskt granskad
    5. The Silacyclobutene Ring: An Indicator of Triplet State Baird-Aromaticity
    Öppna denna publikation i ny flik eller fönster >>The Silacyclobutene Ring: An Indicator of Triplet State Baird-Aromaticity
    2017 (Engelska)Ingår i: Inorganics, ISSN 2304-6740, Vol. 5, nr 4, artikel-id 91Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Baird's rule tells that the electron counts for aromaticity and antiaromaticity in the first pi pi* triplet and singlet excited states (T-1 and S-1) are opposite to those in the ground state (S-0). Our hypothesis is that a silacyclobutene (SCB) ring fused with a [4n]annulene will remain closed in the T-1 state so as to retain T-1 aromaticity of the annulene while it will ring-open when fused to a [4n + 2]annulene in order to alleviate T-1 antiaromaticity. This feature should allow the SCB ring to function as an indicator for triplet state aromaticity. Quantum chemical calculations of energy and (anti)aromaticity changes along the reaction paths in the T-1 state support our hypothesis. The SCB ring should indicate T-1 aromaticity of [4n]annulenes by being photoinert except when fused to cyclobutadiene, where it ring-opens due to ring-strain relief.

    Nyckelord
    Baird's rule, computational chemistry, excited state aromaticity, Photostability
    Nationell ämneskategori
    Kemi
    Identifikatorer
    urn:nbn:se:uu:diva-340320 (URN)10.3390/inorganics5040091 (DOI)000419214000030 ()
    Tillgänglig från: 2018-02-08 Skapad: 2018-02-08 Senast uppdaterad: 2018-04-23Bibliografiskt granskad
    6. The Missing C-1-C-5 Cycloaromatization Reaction: Triplet State Antiaromaticity Relief and Self-Terminating Photorelease of Formaldehyde for Synthesis of Fulvenes from Enynes
    Öppna denna publikation i ny flik eller fönster >>The Missing C-1-C-5 Cycloaromatization Reaction: Triplet State Antiaromaticity Relief and Self-Terminating Photorelease of Formaldehyde for Synthesis of Fulvenes from Enynes
    Visa övriga...
    2015 (Engelska)Ingår i: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 137, nr 49, s. 15441-15450Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    The last missing example of the four archetypical cycloaromatizations of enediynes and enynes was discovered by combining a twisted alkene excited state with a new self-terminating path for intramolecular conversion of diradicals into closed-shell products. Photoexcitation of aromatic enynes to a twisted alkene triplet state creates a unique stereoelectronic situation, which is facilitated by the relief of excited state antiaromaticity of the benzene ring. This enables the usually unfavorable 5-endo-trig cyclization and merges it with 5-exo-dig closure. The 1,4-diradical product of the C1-C5 cyclization undergoes internal H atom transfer that is coupled with the fragmentation of an exocyclic C-C bond. This sequence provides efficient access to benzofulvenes from enynes and expands the utility of self-terminating aromatizing enyne cascades to photochemical reactions. The key feature of this self-terminating reaction is that, despite the involvement of radical species in the key cyclization step, no external radical sources or quenchers are needed to provide the products. In these cascades, both radical centers are formed transiently and converted to the closed-shell products via intramolecular H-transfer and C-C bond fragmentation. Furthermore, incorporating C-C bond cleavage into the photochemical self-terminating cyclizations of enynes opens a new way for the use of alkenes as alkyne equivalents in organic synthesis.

    Nationell ämneskategori
    Fysikalisk kemi Organisk kemi
    Identifikatorer
    urn:nbn:se:uu:diva-274447 (URN)10.1021/jacs.5b07448 (DOI)000366874700026 ()
    Forskningsfinansiär
    Vetenskapsrådet, 621-2011-4177Swedish National Infrastructure for Computing (SNIC)
    Tillgänglig från: 2016-01-21 Skapad: 2016-01-21 Senast uppdaterad: 2018-04-23Bibliografiskt granskad
    7. Metal-free photochemical silylations and transfer hydrogenations of benzenoid hydrocarbons and graphene
    Öppna denna publikation i ny flik eller fönster >>Metal-free photochemical silylations and transfer hydrogenations of benzenoid hydrocarbons and graphene
    Visa övriga...
    2016 (Engelska)Ingår i: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    The first hydrogenation step of benzene, which is endergonic in the electronic ground state (S0), becomes exergonic in the first triplet state (T1). This is in line with Baird’s rule, which tells that benzene is antiaromatic and destabilized in its T1 state and also in its first singlet excited state (S1), opposite to S0, where it is aromatic and remarkably unreactive. Here we utilized this feature to show that benzene and several polycyclic aromatic hydrocarbons (PAHs) to various extents undergo metal-free photochemical (hydro)silylations and transfer-hydrogenations at mild conditions, with the highest yield for naphthalene (photosilylation: 21%). Quantum chemical computations reveal that T1-state benzene is excellent at H-atom abstraction, while COT, aromatic in the T1 and S1 states according to Baird’s rule, is unreactive. Remarkably, also CVD-graphene on SiO2 is efficiently transfer-photohydrogenated using formic acid/water mixtures together with white light or solar irradiation under metal-free conditions.

    Nationell ämneskategori
    Kemi Kemiteknik
    Identifikatorer
    urn:nbn:se:uu:diva-303639 (URN)10.1038/ncomms12962 (DOI)000385553900001 ()27708336 (PubMedID)
    Forskningsfinansiär
    Wenner-Gren StiftelsernaVetenskapsrådetKnut och Alice Wallenbergs StiftelseÅForsk (Ångpanneföreningens Forskningsstiftelse)Magnus Bergvalls Stiftelse
    Tillgänglig från: 2016-09-21 Skapad: 2016-09-21 Senast uppdaterad: 2018-04-23Bibliografiskt granskad
    8. Impact of Ground- and Excited-State Aromaticity on Cyclopentadiene and Silole Excitation Energies and Excited-State Polarities
    Öppna denna publikation i ny flik eller fönster >>Impact of Ground- and Excited-State Aromaticity on Cyclopentadiene and Silole Excitation Energies and Excited-State Polarities
    Visa övriga...
    2014 (Engelska)Ingår i: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 20, nr 30, s. 9295-9303Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    A new qualitative model for estimating the properties of substituted cyclopentadienes and siloles in their lowest pi pi* excited states is introduced and confirmed through quantum chemical calculations, and then applied to explain earlier reported experimental excitation energies. According to our model, which is based on excited-state aromaticity and antiaromaticity, siloles and cyclopentadienes are cross-hyperconjugated "aromatic chameleons" that adapt their electronic structures to conform to the various aromaticity rules in different electronic states (Huckel's rule in the pi(2) electronic ground state (S-0) and Baird's rule in the lowest pi pi* excited singlet and triplet states (S-1 and T-1)). By using pen-and-paper arguments, one can explain polarity changes upon excitation of substituted cyclopentadienes and siloles, and one can tune their lowest excitation energies by combined considerations of ground-and excited-state aromaticity/antiaromaticity effects. Finally, the "aromatic chameleon" model can be extended to other monocyclic compound classes of potential use in organic electronics, thereby providing a unified view of the S-0, T-1, and S-1 states of a range of different cyclic cross-pi-conjugated and cross-hyperconjugated compound classes.

    Nyckelord
    aromaticity, conjugation, density functional calculations, electronic structure, organic electronics
    Nationell ämneskategori
    Fysikalisk kemi
    Identifikatorer
    urn:nbn:se:uu:diva-231122 (URN)10.1002/chem.201402577 (DOI)000339568800022 ()
    Tillgänglig från: 2014-09-04 Skapad: 2014-09-04 Senast uppdaterad: 2018-04-23Bibliografiskt granskad
    9. Can Baird’s and Clar’s Rules Combined Explain Triplet State Energies of Polycyclic Conjugated Hydrocarbons with Fused 4nπ- and (4n + 2)π-Rings?
    Öppna denna publikation i ny flik eller fönster >>Can Baird’s and Clar’s Rules Combined Explain Triplet State Energies of Polycyclic Conjugated Hydrocarbons with Fused 4nπ- and (4n + 2)π-Rings?
    Visa övriga...
    2017 (Engelska)Ingår i: Journal of Organic Chemistry, ISSN 0022-3263, E-ISSN 1520-6904, Vol. 82, nr 12, s. 6327-6340Artikel i tidskrift (Refereegranskat) Published
    Nationell ämneskategori
    Organisk kemi
    Identifikatorer
    urn:nbn:se:uu:diva-332150 (URN)
    Tillgänglig från: 2017-10-24 Skapad: 2017-10-24 Senast uppdaterad: 2018-04-23
    10. Analysis of a Compound Class with Triplet States Stabilized by Potentially Baird Aromatic [10]Annulenyl Dicationic Rings
    Öppna denna publikation i ny flik eller fönster >>Analysis of a Compound Class with Triplet States Stabilized by Potentially Baird Aromatic [10]Annulenyl Dicationic Rings
    Visa övriga...
    2016 (Engelska)Ingår i: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 22, nr 8, s. 2793-2800Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    The low-lying triplet state of a recently published compound (TMTQ) was analyzed quantum chemically in light of suggestions that it is influenced by Baird aromaticity. Two mesomeric structures describe this state: 1)a zwitterionic Baird aromatic structure with a triplet diradical 8-electron methano[10]annulene (M10A) dicationic ring and 2)a Huckel aromatic with a neutral closed-shell 10-electron ring. According to charge and spin density distributions, the Huckel aromatic structure dominates the triplet state (the Baird aromatic contributes at most 12%), and separation of the aromatic fluctuation index (FLU) into and electron contributions emphasizes this finding. The small singlet-triplet energy gap is due to Huckel aromaticity of the M10A ring, clarified by comparison to the smaller analogues of TMTQ. Yet, TMTQ and its analogues are Huckel-Baird hybrids allowing for tuning between closed-shell 4n+2 Huckel aromaticity and open-shell 4n Baird aromaticity.

    Nyckelord
    annulenes, aromaticity, Baird's rule, diradical species, electronic structure
    Nationell ämneskategori
    Kemi
    Identifikatorer
    urn:nbn:se:uu:diva-281795 (URN)10.1002/chem.201504924 (DOI)000370193000029 ()26791436 (PubMedID)
    Forskningsfinansiär
    Vetenskapsrådet, 621-2011-4177
    Tillgänglig från: 2016-03-30 Skapad: 2016-03-30 Senast uppdaterad: 2018-04-23Bibliografiskt granskad
  • Järvå Askenberg, Johan
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Samhällsvetenskapliga fakulteten, Statsvetenskapliga institutionen.
    Användbarhet, alliansfrihet och personalförsörjning: En fameanalys av försvarsdebatten 2009-20172018Självständigt arbete på avancerad nivå (yrkesexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Specimen academicum, crisin Latinam leviter adumbraturum; quod suffragante ampliss. facult. philosoph. in regia academia Vpsaliensi, sub moderamine ... Petri Ekerman ... publicæ candidorum censuræ modeste subjicit s:æ r:æ m:tis alumnus, Olavus E. Roswall, Calmarniensis. [sic] In audit. Carol. maj. ad diem 24 April. a. r. s. MDCCXL. Horis, ante meridiem, solitis.1740Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Dissertatio academica, de campo rhetorum, quam, consentiente ampliss. facult. philosoph. in regia academia Vpsaliensi, præside ... Petro Ekerman ... publice examinandam modeste sistit stipendiarius regius, Johannes B. Norlin, Smolandus. In audit. Carol. major. d. 14 April. an. MDCCXL. Horis, ante meridiem, solitis.1740Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Dissertatio gradualis, de adagiis, quam, ex consensu ampliss. facult. philosoph. in regia academia Vpsaliensi, præside ... Petro Ekerman ... publico examini modeste submittit Carolus Fägersten West-Gothus. In audit. Carol. major. die X Aprilis, an. MDCCXL. Horis, ante meridiem, solitis.1740Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Specimen academicum, de eloquentia juridica, quod consent. ampliss. facult. philos. in reg. Upsaliens. athen. illust. sub auspiciis ... Petri Ekerman ... candido bonorum examini modeste submittit ... Svanto Erici Myrin, Upsaliensis. In audit. Carol. maj. hor. a. m. consvetis, d. XXXI. Mart. a. MDCCXL.1740Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Dissertatio gradualis, ingenium oratorium leviter adumbratura, quam suffragante ampliss. facultat. philosoph. in regia academia Upsal. præside ... Petro Ekerman ... publice examinandam modeste sistit Samuel Hierstedt, Ostro-Gothus. In audit. Carol. maj. die 22. Mart. anni MDCCXL. Horis, ante meridiem, solitis.1740Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Dissertatio gradualis, de rusticatione veterum Romanorum; quam ex consensu ampliss. facult. philosoph. in regia academia Vpsaliensi, præside ... Petro Ekerman ... publico examini modeste subjicit Nicolaus Hofwén, West-Gothus. In audit. Carol. Major. die VIII. Martii, an. MDCCXL. Horis, ante meridiem, solitis.1740Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Dissertatio academica, de vi atque virtute eloquentiæ, quam ex consensu ampliss. facultat. philosoph. in reg. acad. Upsaliensi præside ... Petro Ekerman ... publico bonorum examini modeste committit Petrus P. Ekwall, Ostro-Gothus. In auditorio Gustav. maj. ad diem 20 Decembr. anni MDCCXXXIX. Horis ante meridiem solitis.1739Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Meditationes de ratione lingvam Latinam pueris tradendi, quas, ex consensu ampliss. facultat. philosoph. in reg. acad. Upsaliensi præside ... Petro Ekerman ... pro gradu, publico examini modeste submittit stipendiarius regius Ericus M. Walbom, Ostro-Gothus. In auditorio Gustav. maj. ad 8 diem Decembr. an. MDCCXXXIX. Horis ante meridiem solitis.1739Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Dissertatio academica, de excessu subtilitatis rhetoricæ, quam, consentiente ampliss. senatu philosophico in reg. acad. Upsaliensi, præside ... Petro Ekerman ... pro gradu publice examinandam sistit stipendiarius regius, Albrechtus J. Malmberg, Nycop. Sudermannus. In audit. Carol. major. d. 7. Decembr. ann. MDCCXXXIX. Horis ante meridiem solitis.1739Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Dissertatio gradualis, Martis et Musarum suave consortium leviter adumbratura, quam ex consensu amplissimæ facult. philos. in illustri academ. Vpsaliensi, præside ... Petro Ekerman ... publicæ bonorum disquisitioni modeste sistit Carolus M. Ranchstedt, Westro-Gothus. In audit. Gustav. major. ad diem 17. Novembr. anni MDCCXXXIX. Horis ante meridiem solitis.1739Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Felicitas seculi Ciceroniani, dissertatione graduali leviter adumbrata; quam, consent. ampliss. senatu philosoph. Upsaliens. et moderante ... Petro Ekerman ... publicæ censuræ modeste subjicit, alumnus regius Carolus Sundholm, West-Gothus. In audit. Gust. majori ad d. X. Novemb. anni MDCCXXXIX. Horis ante meridiem solitis.1739Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Specimen academicum, de nexu eloquentiæ cum philosophia, quod ex consensu amplissimæ facult. philos. in regia academ. Vpsaliensi præside ... Petro Ekerman ... publice ventilandum sistit Magnus Warelius, Westro-Gothus. In audit. Gustav. major. ad diem 7. Novembr. anni MDCCXXXIX. Horis ante meridiem solitis.1739Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Dissertatio academica, sectam Ciceronianorum leviter delineatura, quam consensu amplissimi senatus philosophici in regia academia Vpsaliensi, præside ... Petro Ekerman ... publico bonorum examini modeste committit Claudius Claudii Livin, Ostro Gothus. In audit. Gustav. major. die 6. Octobr. anni MDCCXXXIX. Horis ante meridiem solitis.1739Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Declamator Romanus dissertatione graduali leviter delineatus; quam consent. ampliss. senatu philosoph. Vpsaliens. et moderante ... Petro Ekerman, ... publico bonorum examini modeste submittit, stipendiarius regius Ericus Catonius, Calmariensis. In audit. Gust. maj. d. 27. Junii, horis ante meridiem solitis.1739Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Dissertatione academica Roscius in scena leviter adumbratus; quam ex consensu ampliss. facult. philosoph. Upsaliensis, præside ... Petro Ekerman ... publicæ censuræ modeste subjicit, Olavus Er. Sebrelius, Herdahliensis. In audit. Gust. maj. d. 19. Junii, an. MDCCXXXIX. Horis ante meridiem solitis.1739Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Disputatio academica, consilium de civitate Latina condenda leviter adumbrans, quam permissu ampliss. facult. philosoph. Upsaliensis, præside ... Petro Ekerman ... publico examini modeste submittit Matthias Fryksell, Wermelandus. In audit. Gust. maj. d. 7. Junii, an. MDCCXXXIX. horis ante meridiem solitis.1739Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Ekerman, Petrus
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Filosofiska fakulteten.
    Dissertatio, de laconismo Lipsiano, quam cum consensu ampliss. senatus philosoph. in reg. acad. Vpsaliensi, præside ... Petro Ekerman ... pro gradu publico bonorum examini modeste subjicit Nicolaus Laur. Sörström, Dalia-Wermelandus. In audit. Gust. maj. d. 26 Maji, an. MDCCXXXIX. Horis ante meridiem solitis.1739Dissertation (äldre avhandling) (Övrigt vetenskapligt)
  • Disputation: 2018-06-14 09:00 Room 2001, Uppsala
    Droulias, Sotirios A.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Materialfysik.
    The effect of nano-confinement on hydrogen uptake in metallic superlattices2018Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    The absorption of hydrogen is exothermic in vanadium whereas it is endothermic in iron and chromium. Investigations of the hydrogen uptake within Fe/V(001) and Cr/V(001) superlattices allow therefore a detailed exploration of finite size effects and the influence of boundaries on hydrogen absorption. Fe/V(001) and Cr/V(001) superlattices can be grown as single crystal structures with a small mosaic spread, as determined by X-ray reflectometry and diffraction. Furthermore when the thickness ratio of the constituents is kept constant the crystal quality can be retained in the range from a few up to 40 monolayer repeat distances (Λ). Neutron reflectometry was used to simultaneously determine the volume expansion and concentration of hydrogen in the vanadium layers. Large differences are found in the expansion of Fe/V(001) and Cr/V(001) superlattices, in good agreement with density functional theory (DFT) calculations. The findings are consistent with tetrahedral and octahedral site occupancy in Cr/V(001) and Fe/V(001) superlattices, respectively. Full fitting of the reflectivity pattern is required to obtainan accurate measure of expansion if the number of repeats is small. Under these conditions, the shift of the first order superlattice peak can be an inaccurate measure of the volume changes. By using a specially designed neutron scattering chamber, allowing simultaneous neutron and optical transmission measurements, it is found that the optical transmission scales linearly with hydrogen concentration. By comparing the experimental results to ab-initio DFT calculations, it is shown that optical transmission scales with electron density changes in the samples, explaining the linearity with concentration. This change is dominated by the hydrogen induced expansion of the lattices and depends therefore strongly on the site occupancy of the hydrogen. Finally, X-ray diffraction was used to address the local strain fields and the α to β phase transition, typically observed in bulk vanadium. Below 448 K the results are consistent with an α to β phase co-existence, separated along the surface normal of the samples.

    Delarbeten
    1. Crystal perfection by strain engineering: The case of Fe/V (001)
    Öppna denna publikation i ny flik eller fönster >>Crystal perfection by strain engineering: The case of Fe/V (001)
    Visa övriga...
    2017 (Engelska)Ingår i: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 636, s. 608-614Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    We study the effect of bilayer thickness at fixed volume fraction on the structural quality of Fe/V (001)superlattices. We find that such artificial metallic superlattices can be manufactured with excellent crystalquality and layering up to at least 50 Å in repeat distance (K = LFe +LV). For an intended fixed ratio of theconstituents: LFe/LV= 1/7, out-of-plane coherence lengths comparable to the thicknesses of the sampleswere obtained. We evaluate the strain in- and out-of-plane of both layers as a function of the bilayer thicknessand comment on the growth using the framework of linear elasticity theory. We interpret the stabilityof the superlattice against crystal degradation due to the alternating compressive and tensile strain, yieldingclose to ideal lattice matching to the substrate.

    Nyckelord
    Superlattice; Iron/Vanadium; Sputtering; Epitaxy; Reciprocal space mapping; X-ray diffraction; X-ray reflectivity; Linear elasticity
    Nationell ämneskategori
    Annan materialteknik
    Identifikatorer
    urn:nbn:se:uu:diva-332050 (URN)10.1016/j.tsf.2017.07.005 (DOI)000408037800086 ()
    Tillgänglig från: 2017-10-23 Skapad: 2017-10-23 Senast uppdaterad: 2018-05-14Bibliografiskt granskad
    2. Beating effects in multilayer systems studied with neutron reflectometry
    Öppna denna publikation i ny flik eller fönster >>Beating effects in multilayer systems studied with neutron reflectometry
    (Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
    Abstract [en]

    We demonstrate the limitations of a partial, phenomenological tting approach comparedto full simulations, including reection and refraction at all interfaces on theexample of hydrogen loading in ultra thin vanadium layers. Fe/V superlattices areloaded with deuterium and the lattice expansion and deuterium concentration isextracted from neutron reectivity data. We nd a noticeable dierence betweenthe direct extraction of concentrations and bilayer thicknesses from the superlatticepeaks and ts of the full density prole using the Parratt formalism. Our results underlinethe importance of carefully considering the limitations of phenomenologicalapproaches, in order to obtain robust results.

    Nationell ämneskategori
    Fysik
    Identifikatorer
    urn:nbn:se:uu:diva-350582 (URN)
    Tillgänglig från: 2018-05-14 Skapad: 2018-05-14 Senast uppdaterad: 2018-05-18Bibliografiskt granskad
    3. Using interfaces to influence thermodynamic properties of metal hydrides
    Öppna denna publikation i ny flik eller fönster >>Using interfaces to influence thermodynamic properties of metal hydrides
    Visa övriga...
    (Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
    Abstract [en]

    We report profound proximity effects on the enthalpy of solution and critical temperature ofnano-sized vanadium hydrides. We use single crystalline Cr/V and Fe/V (001) superlattices forthese studies, in which the V layers are under close to identical strain. The thermodynamic propertiesare determined using isothermal pressure and optical transmission measurements, utilisingthe fully reversibel hydrogen uptake and release.The underlying mechanism is argued to be rootedin a radically different volume expansion in the two systems, arising from different site occupancyof hydrogen in Fe/V(001) and Cr/V(001). The optical transmission is found to be linear withconcentration in both types of superlattices, while exhibiting different slopes. The differences areattributed to changes in electron density arising from the volume expansion, rather than a directinfluence from a redistribution of electronic states.

    Nationell ämneskategori
    Den kondenserade materiens fysik
    Identifikatorer
    urn:nbn:se:uu:diva-350589 (URN)
    Tillgänglig från: 2018-05-14 Skapad: 2018-05-14 Senast uppdaterad: 2018-05-18Bibliografiskt granskad
    4. The influence of site occupancy on diffusion of hydrogen in vanadium
    Öppna denna publikation i ny flik eller fönster >>The influence of site occupancy on diffusion of hydrogen in vanadium
    Visa övriga...
    2017 (Engelska)Ingår i: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 95, nr 6, artikel-id 064310Artikel, forskningsöversikt (Refereegranskat) Published
    Abstract [en]

    We investigate the effect of site occupancy on the chemical diffusion of hydrogen in strained vanadium. The diffusion rate is found to decrease substantially, when hydrogen is occupying octahedral sites as compared to tetrahedral sites. Profound isotope effects are observed when comparing the diffusion rate of H and D. The changes in the diffusion rate are found to be strongly influenced by the changes in the potential energy landscape, as deduced from first-principles molecular dynamics calculations.

    Nationell ämneskategori
    Den kondenserade materiens fysik
    Identifikatorer
    urn:nbn:se:uu:diva-275058 (URN)10.1103/PhysRevB.95.064310 (DOI)000395988800002 ()
    Anmärkning

    The manuscript version of this article is part of two PhD theses: http://uu.diva-portal.org/smash/record.jsf?pid=diva2:900624

    http://uu.diva-portal.org/smash/record.jsf?pid=diva2:950756

    Tillgänglig från: 2016-01-28 Skapad: 2016-01-28 Senast uppdaterad: 2018-05-14Bibliografiskt granskad
    5. Finite size effects: deuterium diffusion in nm thick vanadium layers
    Öppna denna publikation i ny flik eller fönster >>Finite size effects: deuterium diffusion in nm thick vanadium layers
    Visa övriga...
    2017 (Engelska)Ingår i: New Journal of Physics, ISSN 1367-2630, E-ISSN 1367-2630, Vol. 19, artikel-id 123004Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    We investigate the effect of finite size on the chemical diffusion of deuterium in extremely thin V(001) layers. A five fold increase in the diffusion coefficient is observed at concentrations around 0.2 [D/V], when the thickness of the V is decreased from 28 to 14 atomic layers (approximate to 2.1-4.2 nm). The size dependent deuterium-deuterium interaction energy is argued to be the root of the observed changes as the diffusion rates are similar at low concentrations. The results demonstrate the feasibility of using finite-size effects to enhance the chemical diffusion of light interstitials in solids. We discuss the general applicability of these effects to other systems.

    Ort, förlag, år, upplaga, sidor
    Institute of Physics Publishing (IOPP), 2017
    Nyckelord
    superlattices, optical transmission, deuterium diffusion, octahedral sites
    Nationell ämneskategori
    Fysik
    Identifikatorer
    urn:nbn:se:uu:diva-347665 (URN)10.1088/1367-2630/aa94df (DOI)000424885300004 ()
    Forskningsfinansiär
    EnergimyndighetenVetenskapsrådet
    Tillgänglig från: 2018-04-05 Skapad: 2018-04-05 Senast uppdaterad: 2018-05-14Bibliografiskt granskad
    6. Concentration dependence of hydrogen diffusion in clamped vanadium (001) films
    Öppna denna publikation i ny flik eller fönster >>Concentration dependence of hydrogen diffusion in clamped vanadium (001) films
    Visa övriga...
    2017 (Engelska)Ingår i: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 29, nr 4, artikel-id 045402Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    The chemical diffusion coefficient of hydrogen in a 50 nm thin film of vanadium (0 0 1) is measured as a function of concentration and temperature, well above the known phase boundaries. Arrhenius analysis of the tracer diffusion constants reveal large changes in the activation energy with concentration: from 0.10 at 0.05 in II V-1 to 0.5 eV at 0.2 in II V-1. The results are consistent with a change from tetrahedral to octahedral site occupancy, in that concentration range. The change in site occupancy is argued to be caused by the uniaxial expansion of the film originating from the combined hydrogen induced expansion and the clamping of the film to the substrate.

    Nyckelord
    diffusion, hydrogen, single crystal
    Nationell ämneskategori
    Den kondenserade materiens fysik
    Identifikatorer
    urn:nbn:se:uu:diva-312024 (URN)10.1088/1361-648X/29/4/045402 (DOI)000389233200001 ()
    Forskningsfinansiär
    EnergimyndighetenVetenskapsrådet
    Tillgänglig från: 2017-01-05 Skapad: 2017-01-04 Senast uppdaterad: 2018-05-14Bibliografiskt granskad
    7. Experimental observation of hysteresis in a coherent metal-hydride phase transition
    Öppna denna publikation i ny flik eller fönster >>Experimental observation of hysteresis in a coherent metal-hydride phase transition
    Visa övriga...
    2017 (Engelska)Ingår i: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 29, nr 49, artikel-id 495701Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    We investigate the hysteresis obtained in the hydrogen absorption and desorption cycle for a single crystal Pd/V-28 [Fe-4/V-28](11) superlattice. Below the critical temperature, a small but clear hysteresis is observed in the pressure-composition isotherms, while it is absent above. The experimental results thereby prove the relevance of macroscopic energy barriers for obtaining hysteresis in coherent structural transformations. The textured Pd layer exhibits substantially larger hysteresis effects, which can be related to an irreversible energy loss caused by defect generation in Pd.

    Ort, förlag, år, upplaga, sidor
    IOP PUBLISHING LTD, 2017
    Nyckelord
    hysteresis, coherent, incoherent, phase transition
    Nationell ämneskategori
    Den kondenserade materiens fysik
    Identifikatorer
    urn:nbn:se:uu:diva-342651 (URN)10.1088/1361-648X/aa9696 (DOI)000415854900001 ()
    Forskningsfinansiär
    EnergimyndighetenVetenskapsrådet
    Tillgänglig från: 2018-02-28 Skapad: 2018-02-28 Senast uppdaterad: 2018-05-14Bibliografiskt granskad
  • Enström, Nette
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Samhällsvetenskapliga fakulteten, Statsvetenskapliga institutionen.
    Liberal likabehandling och kulturella grupprättigheter ur genusperspektiv: En feministisk analys av två politiska strategier2004Självständigt arbete på avancerad nivå (magisterexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

      

  • Ljung, Bo
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Konstvetenskapliga institutionen.
    EN URBAN KULTPLATS.: Biografteatern Palladium i Stockholm och dess konstnärliga utsmyckning 1918.2016Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Uppsatsen är en receptionsteoretisk studie av Olle Hjortzbergs konstnärliga utsmyckning i biografteatern Palladium i Stockholm. Biografen invigdes 1918. Salongen i Palladium var ett allkonstverk där rumskonstruktion och konst var sammanflätad till en storslagen och ideologisk helhet. I den konstnärliga utsmyckningen framträder ett konstnärskap som både framåtriktat och bakåtriktat. Olle Hjortzberg återbrukar traditionens tekniker och symboler och ger dem en ny roll i samtiden. Tillvägagångssättet vid byggandet av Palladium påminner om äldre tiders kyrkobyggen där stiftare, arkitekt, präst, hantverkare och konstnär utarbetade ideologi och form gemensamt. Att anpassa måleriet till rummets arkitektur är en av flera paralleller till de senmedeltida kyrkomåleriet. Växtornamentik och bilder var i biografens valv, väggar och tak framförda av Olle Hjortzberg på ett likartat sätt som i de medeltida kyrkorna. Man kan också finna konstnärliga kopplingar till både 1800-talets germanska symbolism och den modernistiska tyska expressionismen. Hjortzberg återanvänder och omformar i Palladium den germanska och nordiska symbolismens tecken för mörkret och det undermedvetna till ljus, livskraft och rörelse. Det medeltida kalkmåleriets auktoritära realism omvänds i Palladiums konstnärliga form till en inbjudan för betraktaren mot en fri och individuell tolkning. Det modernistiska biografrummet framträder som en öppen och rörlig plats som fylls av andra platser utan hierarkisk ordning och är lika tillgänglig för alla, en demokratisk plats.

    Interiörerna i Palladium påminner i sin struktur och uppbyggnad om filmkonsten. Besökaren koreograferar sin visuella upplevelse i biografen genom att fritt förflytta sig mellan rummen och genom att välja ut olika bilder och objekt att titta på. Ur detta perspektiv fungerar biograflokalens rumslighet som filmens serier av ögonblick skapad av kameraåkningar, klipp och perspektivförändringar. Valvbågar med bilder i rutor runt om hela salongen och kassettakets rutnät av bilder sätter blicken och besökaren i rörelse och understryker filmens rörelsekaraktär. Palladium och dess konstnärliga utsmyckning framstår på detta sätt som en filmisk metafor

  • Pelaghias, Stephanie
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Konstvetenskapliga institutionen.
    ”Det goda skall segra”, om återuppbyggnadsprocesser av Lundby nya kyrka och Ledsjö kyrka med fokus på interiör och konst.2018Självständigt arbete på avancerad nivå (masterexamen), 30 poäng / 45 hpStudentuppsats (Examensarbete)
  • Stjärnesund, Johan
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik.
    A micro-CT investigation of density changes in pressboard due to compression2018Självständigt arbete på avancerad nivå (yrkesexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Pressboard, a high-density cellulose-based product, is used both as load bearing structures and dielectric insulation in oil-filled power transformers. During transformer operation, mechanical forces and vibrations are applied on the material. In particular, this investigation focuses on pressboard sheets placed between the turns of transformer windings, called the spacers, which during short circuit are subjected to high compressive forces of impulse nature. As a result of these forces, remaining deformations are created in the components. One step to reduce the negative consequences that come from the deformations is to understand how the fiber structure of the material changes by these forces, thus finding the week link. Understanding these changes could lead to future modification of the material to better withstand short circuits.

    To see the fiber structure and its changes in the material, pressboard has been investigated with a micro-CT at the Division of Applied Mechanics at Uppsala University. The scanned images have been reconstructed and analyzed in NRecon, CTAnalyser, and Matlab to investigate the density distribution changes and to identify the densification patterns. The study shows that pressboard initially has an inhomogeneous density distribution through the thickness and after mechanical indentations, the densification tends to begin in the more porous parts of the material. The project also included a prediction of the densification pattern, performed by finite element analysis (FEA) using a simplified material model. The results show that a material model with varying Young’s modulus through the thickness, based on a stiffness and porosity relationship, can produce similar densification patterns as in the experiments.

  • Mao, Guanzhong
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för cell- och molekylärbiologi, Molekylärbiologi.
    Srivastava, Abhishek S.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för cell- och molekylärbiologi, Molekylärbiologi. AstraZeneca R&D, Discovery Sci, Cambridge Sci Pk, Cambridge, England..
    Wu, Shiying
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för cell- och molekylärbiologi.
    Kosek, David
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för cell- och molekylärbiologi, Molekylärbiologi.
    Lindell, Magnus
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för cell- och molekylärbiologi, Molekylärbiologi.
    Kirsebom, Leif
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för cell- och molekylärbiologi.
    Critical domain interactions for type A RNase P RNA catalysis with and without the specificity domain2018Ingår i: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 13, nr 3, artikel-id e0192873Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The natural trans-acting ribozyme RNase P RNA (RPR) is composed of two domains in which the catalytic (C-) domain mediates cleavage of various substrates. The C-domain alone, after removal of the second specificity (S-) domain, catalyzes this reaction as well, albeit with reduced efficiency. Here we provide experimental evidence indicating that efficient cleavage mediated by the Escherichia coli C-domain (Eco CP RPR) with and without the C5 protein likely depends on an interaction referred to as the "P6-mimic". Moreover, the P18 helix connects the C-and S-domains between its loop and the P8 helix in the S-domain (the P8/P18-interaction). In contrast to the "P6-mimic", the presence of P18 does not contribute to the catalytic performance by the C-domain lacking the S-domain in cleavage of an all ribo model hairpin loop substrate while deletion or disruption of the P8/P18-interaction in full-size RPR lowers the catalytic efficiency in cleavage of the same model hairpin loop substrate in keeping with previously reported data using precursor tRNAs. Consistent with that P18 is not required for cleavage mediated by the C-domain we show that the archaeal Pyrococcus furiosus RPR C-domain, which lacks the P18 helix, is catalytically active in trans without the S-domain and any protein. Our data also suggest that the S-domain has a larger impact on catalysis for E. coli RPR compared to P. furiosus RPR. Finally, we provide data indicating that the absence of the S-domain and P18, or the P8/P18-interaction in full-length RPR influences the charge distribution near the cleavage site in the RPR-substrate complex to a small but reproducible extent.

  • Nyberg, Selma
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för systemteknik.
    Video Recommendation Based on Object Detection2018Självständigt arbete på avancerad nivå (yrkesexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    In this thesis, various machine learning domains have been combined in order to build a video recommender system that is based on object detection. The work combines two extensively studied research fields, recommender systems and computer vision, that also are rapidly growing and popular techniques on commercial markets. To investigate the performance of the approach, three different content-based recommender systems have been implemented at Spotify, which are based on the following video features: object detections, titles and descriptions, and user preferences. These systems have then been evaluated and compared against each other together with their hybridized result. Two algorithms have been implemented, the prediction and the top-N algorithm, where the former is the more reliable source for evaluating the system's performance.

    The evaluation of the system shows that the overall performance scores for predicting values of the users' liked and disliked videos are in the range from about 40 % to 70 % for the prediction algorithm and from about 15 % to 70 % for the top-N algorithm. The approach based on object detection performs worse in comparison to the other approaches. Hence, there seems to be is a low correlation between the user preferences and the video contents in terms of object detection data. Therefore, this data is not very suitable for describing the content of videos and using it in the recommender system. However, the results of this study cannot be generalized to apply for other systems before the approach has been evaluated in other environments and for various data sets. Moreover, there are plenty of room for refinements and improvements to the system, as well as there are many interesting research areas for future work.

  • Franzen, Oscar
    et al.
    Karolinska Inst, Integrated Cardio Metab Ctr, Huddinge, Sweden..
    Ermel, Raili
    Tartu Univ Hosp, Dept Cardiac Surg, Tartu, Estonia..
    Sukhavasi, Katyayani
    Univ Tartu, Inst Biomed & Translat Med, Dept Pathophysiol, Tartu, Estonia..
    Jain, Rajeev
    Univ Tartu, Inst Biomed & Translat Med, Dept Pathophysiol, Tartu, Estonia..
    Jain, Anamika
    Univ Tartu, Inst Biomed & Translat Med, Dept Pathophysiol, Tartu, Estonia..
    Betsholtz, Christer
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för immunologi, genetik och patologi, Vaskulärbiologi. Karolinska Inst, Integrated Cardio Metab Ctr, Huddinge, Sweden.
    Giannarelli, Chiara
    Icahn Sch Med Mt Sinai, Cardiovasc Res Ctr, New York, NY 10029 USA.;Icahn Sch Med Mt Sinai, Inst Genom & Multiscale Biol, Dept Genet & Genom Sci, New York, NY 10029 USA..
    Kovacic, Jason C.
    Icahn Sch Med Mt Sinai, Cardiovasc Res Ctr, New York, NY 10029 USA..
    Ruusalepp, Arno
    Tartu Univ Hosp, Dept Cardiac Surg, Tartu, Estonia.;Univ Tartu, Inst Biomed & Translat Med, Dept Pathophysiol, Tartu, Estonia.;Clin Gene Networks AB, Stockholm, Sweden..
    Skogsberg, Josefin
    Karolinska Inst, Dept Med Biochem & Biophys, Solna, Sweden..
    Hao, Ke
    Icahn Sch Med Mt Sinai, Inst Genom & Multiscale Biol, Dept Genet & Genom Sci, New York, NY 10029 USA..
    Schadt, Eric E.
    Icahn Sch Med Mt Sinai, Inst Genom & Multiscale Biol, Dept Genet & Genom Sci, New York, NY 10029 USA.;Clin Gene Networks AB, Stockholm, Sweden..
    Bjoerkegren, Johan L. M.
    Karolinska Inst, Integrated Cardio Metab Ctr, Huddinge, Sweden.;Univ Tartu, Inst Biomed & Translat Med, Dept Pathophysiol, Tartu, Estonia.;Icahn Sch Med Mt Sinai, Inst Genom & Multiscale Biol, Dept Genet & Genom Sci, New York, NY 10029 USA.;Clin Gene Networks AB, Stockholm, Sweden..
    Global analysis of A-to-I RNA editing reveals association with common disease variants2018Ingår i: PeerJ, ISSN 2167-8359, E-ISSN 2167-8359, Vol. 6, artikel-id e4466Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    RNA editing modifies transcripts and may alter their regulation or function. In humans, the most common modification is adenosine to inosine (A-to-I). We examined the global characteristics of RNA editing in 4,301 human tissue samples. More than 1.6 million A-to-I edits were identified in 62% of all protein-coding transcripts. mRNA recoding was extremely rare; only 11 novel recoding sites were uncovered. Thirty single nucleotide polymorphisms from genome-wide association studies were associated with RNA editing; one that influences type 2 diabetes (rs2028299) was associated with editing in ARPIN. Twenty-five genes, including LRP11 and PLIN5, had editing sites that were associated with plasma lipid levels. Our findings provide new insights into the genetic regulation of RNA editing and establish a rich catalogue for further exploration of this process.

  • Ygland, Emil
    et al.
    Lund Univ, Skane Univ Hosp, Dept Clin Sci Lund, Neurol, Getingevagen 4, S-22185 Lund, Sweden..
    van Westen, Danielle
    Lund Univ, Skane Univ Hosp, Dept Clin Sci Lund, Diagnost Radiol, Getingevagen 4, S-22185 Lund, Sweden..
    Englund, Elisabet
    Lund Univ, Skane Univ Hosp, Dept Clin Sci Lund, Oncol & Pathol, Solvegatan 23, S-22185 Lund, Sweden..
    Rademakers, Rosa
    Mayo Clin, Dept Neurosci, 4500 San Pablo Rd, Jacksonville, FL 32224 USA..
    Wszolek, Zbigniew K.
    Mayo Clin, Dept Neurol, 4500 San Pablo Rd, Jacksonville, FL 32224 USA..
    Nilsson, Karin
    Lund Univ, Skane Univ Hosp, Dept Clin Sci Lund, Neurol, Getingevagen 4, S-22185 Lund, Sweden..
    Nilsson, Christer
    Lund Univ, Skane Univ Hosp, Dept Clin Sci Lund, Neurol, Getingevagen 4, S-22185 Lund, Sweden..
    Waldo, Maria Landqvist
    Lund Univ, Skane Univ Hosp, Angelholm Hosp, Dept Clin Sci Lund,Memory Clin, Vastersjogatan 10, S-26282 Angelholm, Sweden..
    Alafuzoff, Irina
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för immunologi, genetik och patologi, Klinisk och experimentell patologi.
    Hansson, Oskar
    Lund Univ, Dept Clin Sci Malmo, Clin Memory Res Unit, Lund, Sweden.;Skane Univ Hosp, Memory Clin, S-20502 Malmo, Sweden..
    Gustafson, Lars
    Lund Univ, Skane Univ Hosp, Dept Clin Sci Lund, Neurol, Getingevagen 4, S-22185 Lund, Sweden..
    Puschmann, Andreas
    Lund Univ, Skane Univ Hosp, Dept Clin Sci Lund, Neurol, Getingevagen 4, S-22185 Lund, Sweden..
    Slowly progressive dementia caused by MAPT R406W mutations: longitudinal report on a new kindred and systematic review2018Ingår i: Alzheimer's Research & Therapy, ISSN 0065-6755, E-ISSN 1758-9193, Vol. 10, artikel-id 2Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    Background: The MAPT c.1216C > T (p.Arg406Trp; R406W) mutation is a known cause of frontotemporal dementia with Parkinsonism linked to chromosome 17 tau with Alzheimer's disease-like clinical features. Methods: We compiled clinical data from a new Swedish kindred with R406W mutation. Seven family members were followed longitudinally for up to 22 years. Radiological examinations were performed in six family members and neuropathological examinations in three. We systematically reviewed the literature and compiled clinical, radiological, and neuropathological data on 63 previously described R406W heterozygotes and 3 homozygotes. Results: For all cases combined, the median age of onset was 56 years and the median disease duration was 13 years. Memory impairment was the most frequent symptom, behavioral disturbance and language impairment were less common, and Parkinsonism was rare. Disease progression was most often slow. The most frequent clinical diagnosis was Alzheimer's disease. R406W homozygotes had an earlier age at onset and a higher frequency of behavioral symptoms and Parkinsonism than heterozygotes. In the new Swedish kindred, a consistent imaging finding was ventromedial temporal lobe atrophy, which was evident also in early disease stages as a widening of the collateral sulcus with ensuing atrophy of the parahippocampal gyrus. Unlike previously published R406W carriers, all three autopsied patients from the novel family showed neuropathological similarities with progressive supranuclear palsy, with predominant four-repeat (exon 10+) tau isoform (4R) tauopathy and neurofibrillary tangles accentuated in the basal-medial temporal lobe. Amyloid-beta pathology was absent. Conclusions: Dominance of 4R over three-repeat (exon 10-) tau isoforms contrasts with earlier reports of R406W patients and was not sufficiently explained by the presence of H1/H2 haplotypes in two of the autopsied patients. R406W patients often show a long course of disease with marked memory deficits. Both our neuropathological results and our imaging findings revealed that the ventromedial temporal lobes were extensively affected in the disease. We suggest that this area may represent the point of origin of tau deposition in this disease with relatively isolated tauopathy.

  • Ström, Per
    Uppsala universitet, Universitetsförvaltningen.
    Promotionsfesten i Uppsala den 1 juni 20182018Samlingsverk (redaktörskap) (Övrig (populärvetenskap, debatt, mm))
  • Camargo-Molina, Jose Eliel
    et al.
    Lund Univ, Dept Astron & Theoret Phys, SE-22362 Lund, Sweden..
    Mandal, Tanumoy
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik. Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India..
    Pasechnik, Roman
    Lund Univ, Dept Astron & Theoret Phys, SE-22362 Lund, Sweden..
    Wessen, Jonas
    Lund Univ, Dept Astron & Theoret Phys, SE-22362 Lund, Sweden..
    Heavy charged scalars from cs̄ fusion: a generic search strategy applied to a 3HDM with U(1) x U(1) family symmetry2018Ingår i: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, nr 3, artikel-id 024Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We describe a class of three Higgs doublet models (3HDMs) with a softly broken U(1) x U(1) family symmetry that enforces a Cabibbo-like quark mixing while forbidding tree-level flavour changing neutral currents. The hierarchy in the observed quark masses is partly explained by a softer hierarchy in the vacuum expectation values of the three Higgs doublets. As a consequence, the physical scalar spectrum contains a Standard Model (SM) like Higgs boson h(125) while exotic scalars couple the strongest to the second quark family, leading to rather unconventional discovery channels that could be probed at the Large Hadron Collider. In particular, we describe a search strategy for the lightest charged Higgs boson H-+/-, through the process c -> H+ -> W+ h(125), using a multivariate analysis that leads to an excellent discriminatory power against the SM background. Although the analysis is applied to the proposed class of 3HDMs, we employ a model-independent formulation such that it can be applied to any other model with the same discovery channel.

  • Petersson, Nina
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - BMC.
    Optimisation of capillary gel electrophoresis method for enhanced separation of mRNA shortmers2018Självständigt arbete på avancerad nivå (yrkesexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Advancements in the field of modified messenger RNA (mRNA) has led to new ventures in the pharmaceutical industry. However, new drug products demand new analytical methods to ensure the efficacy and purity of the drug. Capillary gel electrophoresis (CGE) with UV detection shows great potential for separation of mRNA samples due to the equal mass-to-charge ratio of mRNA and the flexible parameters of the CGE methods. This thesis investigates the optimal parameters of the capillary electrophoresis method, sample treatment procedure and sieving medium composition for enhanced shortmers separation of mRNA by CGE analysis. An RNA ladder with 100-1000 nucleotides and EPO mRNA with 900 nucleotides were used as model compounds. The effect of capillary dimensions and separation temperature on the resolution of the RNA peaks was established through comparative experiments. Sample treatment processes were evaluated to achieve an optimal conformation of the mRNA for CGE analysis. By heating the mRNA sample for 15 min at 80°C all multimers were seemingly eradicated. Moreover, it was found that addition of 4 M of urea to mRNA sample before heating resulted in improved peak shape. A sieving medium consisting of a mix of the two polymers polyvinylpyrrolidine (PVP) and hydroxyethyl cellulose (HEC) proved to have beneficial qualities for separation. The addition of sucrose as viscosity modifier in the sieving medium surprisingly further enhanced the resolution. Moreover, during the project a heavy wash was established which drastically improved repeatability of the analyses through more efficient regeneration of the capillary. ISSN:

  • Ablikim, M.
    et al.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Achasov, M. N.
    GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia.;Novosibirsk State Univ, Novosibirsk 630090, Russia..
    Ahmed, S.
    Helmholtz Inst Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Albrecht, M.
    Ruhr Univ Bochum, D-44780 Bochum, Germany..
    Amoroso, A.
    Univ Turin, I-10125 Turin, Italy.;INFN, I-10125 Turin, Italy..
    An, F. F.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    An, Q.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Bai, J. Z.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Bakina, O.
    Ferroli, R. Baldini
    INFN Lab Nazl Frascati, I-00044 Frascati, Italy..
    Ban, Y.
    Peking Univ, Beijing 100871, Peoples R China..
    Bennett, D. W.
    Indiana Univ, Bloomington, IN 47405 USA..
    Bennett, J. V.
    Carnegie Mellon Univ, Pittsburgh, PA 15213 USA..
    Berger, N.
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Bertani, M.
    INFN Lab Nazl Frascati, I-00044 Frascati, Italy..
    Bettoni, D.
    INFN Sez Ferrara, I-44122 Ferrara, Italy..
    Bian, J. M.
    Univ Minnesota, Minneapolis, MN 55455 USA..
    Bianchi, F.
    Univ Turin, I-10125 Turin, Italy.;INFN, I-10125 Turin, Italy..
    Boger, E.
    Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia.;Moscow Inst Phys & Technol, Moscow 141700, Russia..
    Boyko, I.
    Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia..
    Briere, R. A.
    Carnegie Mellon Univ, Pittsburgh, PA 15213 USA..
    Cai, H.
    Wuhan Univ, Wuhan 430072, Hubei, Peoples R China..
    Cai, X.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Cakir, O.
    Ankara Univ, TR-06100 Ankara, Turkey..
    Calcaterra, A.
    Cao, G. F.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Cetin, S. A.
    Istanbul Bilgi Univ, TR-34060 Istanbul, Turkey..
    Chai, J.
    INFN, I-10125 Turin, Italy..
    Chang, J. F.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Chelkov, G.
    Moscow Inst Phys & Technol, Moscow 141700, Russia.;Tomsk State Univ, Funct Elect Lab, Tomsk 634050, Russia..
    Chen, G.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Chen, H. S.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Chen, J. C.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Chen, M. L.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Chen, S. J.
    Nanjing Univ, Nanjing 210093, Jiangsu, Peoples R China..
    Chen, X. R.
    Lanzhou Univ, Lanzhou 730000, Gansu, Peoples R China..
    Chen, Y. B.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Chu, X. K.
    Peking Univ, Beijing 100871, Peoples R China..
    Cibinetto, G.
    INFN Sez Ferrara, I-44122 Ferrara, Italy..
    Dai, H. L.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Dai, J. P.
    Shanghai Jiao Tong Univ, Shanghai 200240, Peoples R China..
    Dbeyssi, A.
    Helmholtz Inst Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Dedovich, D.
    Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia..
    Deng, Z. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Denig, A.
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Denysenko, I.
    Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia..
    Destefanis, M.
    Univ Turin, I-10125 Turin, Italy.;INFN, I-10125 Turin, Italy..
    De Mori, F.
    Univ Turin, I-10125 Turin, Italy.;INFN, I-10125 Turin, Italy..
    Ding, Y.
    Liaoning Univ, Shenyang 110036, Liaoning, Peoples R China..
    Dong, C.
    Nankai Univ, Tianjin 300071, Peoples R China..
    Dong, J.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Dong, L. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Dong, M. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Dorjkhaidav, O.
    Inst Phys & Technol, Peace Ave 54B, Ulaanbaatar 13330, Mongol Peo Rep..
    Dou, Z. L.
    Nanjing Univ, Nanjing 210093, Jiangsu, Peoples R China..
    Du, S. X.
    Zhengzhou Univ, Zhengzhou 450001, Henan, Peoples R China..
    Duan, P. F.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Fang, J.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Fang, S. S.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Fang, X.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Fang, Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Farinelli, R.
    INFN Sez Ferrara, I-44122 Ferrara, Italy.;Univ Ferrara, I-44122 Ferrara, Italy..
    Fava, L.
    Univ Piemonte Orientale, I-15121 Alessandria, Italy.;INFN, I-10125 Turin, Italy..
    Fegan, S.
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Feldbauer, F.
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Felici, G.
    INFN Lab Nazl Frascati, I-00044 Frascati, Italy..
    Feng, C. Q.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Fioravanti, E.
    INFN Sez Ferrara, I-44122 Ferrara, Italy..
    Fritsch, M.
    Helmholtz Inst Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany.;Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Fu, C. D.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Gao, Q.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Gao, X. L.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Gao, Y.
    Tsinghua Univ, Beijing 100084, Peoples R China..
    Gao, Y. G.
    Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China..
    Gao, Z.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Garzia, I.
    INFN Sez Ferrara, I-44122 Ferrara, Italy..
    Goetzen, K.
    GSI Helmholtzcentre Heavy Ion Res GmbH, D-64291 Darmstadt, Germany..
    Gong, L.
    Nankai Univ, Tianjin 300071, Peoples R China..
    Gong, W. X.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Gradl, W.
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Greco, M.
    Univ Turin, I-10125 Turin, Italy.;INFN, I-10125 Turin, Italy..
    Gu, M. H.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Gu, S.
    Henan Normal Univ, Xinxiang 453007, Peoples R China..
    Gu, Y. T.
    Guangxi Univ, Nanning 530004, Peoples R China..
    Guo, A. Q.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Guo, L. B.
    Nanjing Normal Univ, Nanjing 210023, Jiangsu, Peoples R China..
    Guo, R. P.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Guo, Y. P.
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Haddadi, Z.
    Univ Groningen, KVI CART, NL-9747 AA Groningen, Netherlands..
    Hafner, A.
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Han, S.
    Wuhan Univ, Wuhan 430072, Hubei, Peoples R China..
    Hao, X. Q.
    Henan Normal Univ, Xinxiang 453007, Peoples R China..
    Harris, F. A.
    Univ Hawaii, Honolulu, HI 96822 USA..
    He, K. L.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    He, X. Q.
    Univ Sci & Technol Liaoning, Anshan 114051, Peoples R China..
    Heinsius, F. H.
    Ruhr Univ Bochum, D-44780 Bochum, Germany..
    Held, T.
    Ruhr Univ Bochum, D-44780 Bochum, Germany..
    Heng, Y. K.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Holtmann, T.
    Ruhr Univ Bochum, D-44780 Bochum, Germany..
    Hou, Z. L.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Hu, C.
    Nanjing Normal Univ, Nanjing 210023, Jiangsu, Peoples R China..
    Hu, H. M.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Hu, T.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Hu, Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Huang, G. S.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Huang, J. S.
    Henan Normal Univ, Xinxiang 453007, Peoples R China..
    Huang, X. T.
    Shandong Univ, Jinan 250100, Shandong, Peoples R China..
    Huang, X. Z.
    Nanjing Univ, Nanjing 210093, Jiangsu, Peoples R China..
    Huang, Z. L.
    Liaoning Univ, Shenyang 110036, Liaoning, Peoples R China..
    Hussain, T.
    Univ Punjab, Lahore, Pakistan..
    Andersson, Walter Ikegami
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Ji, Q.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Ji, Q. P.
    Henan Normal Univ, Xinxiang 453007, Peoples R China..
    Ji, X. B.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Ji, X. L.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Jiang, X. S.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Jiang, X. Y.
    Nankai Univ, Tianjin 300071, Peoples R China..
    Jiao, J. B.
    Shandong Univ, Jinan 250100, Shandong, Peoples R China..
    Jiao, Z.
    Huangshan Coll, Huangshan 245000, Peoples R China..
    Jin, D. P.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Jin, S.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Johansson, Tord
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Julin, A.
    Univ Minnesota, Minneapolis, MN 55455 USA..
    Kalantar-Nayestanaki, N.
    Univ Groningen, KVI CART, NL-9747 AA Groningen, Netherlands..
    Kang, X. L.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Kang, X. S.
    Nankai Univ, Tianjin 300071, Peoples R China..
    Kavatsyuk, M.
    Univ Groningen, KVI CART, NL-9747 AA Groningen, Netherlands..
    Ke, B. C.
    Carnegie Mellon Univ, Pittsburgh, PA 15213 USA..
    Khan, T.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Kiese, P.
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Kliemt, R.
    GSI Helmholtzcentre Heavy Ion Res GmbH, D-64291 Darmstadt, Germany..
    Kloss, B.
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Koch, L.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Kolcu, O. B.
    Istanbul Bilgi Univ, TR-34060 Istanbul, Turkey.;Bogazici Univ, TR-34342 Istanbul, Turkey.;Istanbul Arel Univ, TR-34295 Istanbul, Turkey..
    Kopf, B.
    Ruhr Univ Bochum, D-44780 Bochum, Germany..
    Kornicer, M.
    Univ Hawaii, Honolulu, HI 96822 USA..
    Kuemmel, M.
    Ruhr Univ Bochum, D-44780 Bochum, Germany..
    Kuhlmann, M.
    Ruhr Univ Bochum, D-44780 Bochum, Germany..
    Kupsc, Andrzej
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Kuehn, W.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Lange, J. S.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Lara, M.
    Indiana Univ, Bloomington, IN 47405 USA..
    Larin, P.
    Helmholtz Inst Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Lavezzi, L.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;INFN, I-10125 Turin, Italy..
    Leithoff, H.
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Leng, C.
    INFN, I-10125 Turin, Italy..
    Li, Cui
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Li, Cheng
    Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Li, D. M.
    Zhengzhou Univ, Zhengzhou 450001, Henan, Peoples R China..
    Li, F.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Li, F. Y.
    Peking Univ, Beijing 100871, Peoples R China..
    Li, G.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Li, H. B.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Li, H. J.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Li, J. C.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Li, Jin
    Seoul Natl Univ, Seoul 151747, South Korea..
    Li, K.
    Hangzhou Normal Univ, Hangzhou 310036, Zhejiang, Peoples R China.;Shandong Univ, Jinan 250100, Shandong, Peoples R China..
    Li, Lei
    Beijing Inst Petrochem Technol, Beijing 102617, Peoples R China..
    Li, P. L.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Li, P. R.
    China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China.;Univ Chinese Acad Sci, Beijing 100049, Peoples R China..
    Li, Q. Y.
    Shandong Univ, Jinan 250100, Shandong, Peoples R China..
    Li, T.
    Shandong Univ, Jinan 250100, Shandong, Peoples R China..
    Li, W. D.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Li, W. G.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Li, X. L.
    Shandong Univ, Jinan 250100, Shandong, Peoples R China..
    Li, X. N.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Li, X. Q.
    Nankai Univ, Tianjin 300071, Peoples R China..
    Li, Z. B.
    Sun Yat Sen Univ, Guangzhou 510275, Guangdong, Peoples R China..
    Liang, H.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Liang, Y. F.
    Sichuan Univ, Chengdu 610064, Sichuan, Peoples R China..
    Liang, Y. T.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Liao, G. R.
    Guangxi Normal Univ, Guilin 541004, Peoples R China..
    Lin, D. X.
    Helmholtz Inst Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Liu, B.
    Shanghai Jiao Tong Univ, Shanghai 200240, Peoples R China..
    Liu, B. J.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Liu, C. X.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Liu, D.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Liu, F. H.
    Shanxi Univ, Taiyuan 030006, Shanxi, Peoples R China..
    Liu, Fang
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Liu, Feng
    Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China..
    Liu, H. B.
    Guangxi Univ, Nanning 530004, Peoples R China..
    Liu, H. H.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;Henan Univ Sci & Technol, Luoyang 471003, Peoples R China..
    Liu, H. M.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Liu, J. B.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Liu, J. P.
    Wuhan Univ, Wuhan 430072, Hubei, Peoples R China..
    Liu, J. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Liu, K.
    Tsinghua Univ, Beijing 100084, Peoples R China..
    Liu, K. Y.
    Liaoning Univ, Shenyang 110036, Liaoning, Peoples R China..
    Liu, Ke
    Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China..
    Liu, L. D.
    Peking Univ, Beijing 100871, Peoples R China..
    Liu, P. L.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Liu, Q.
    Univ Chinese Acad Sci, Beijing 100049, Peoples R China..
    Liu, S. B.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Liu, X.
    Lanzhou Univ, Lanzhou 730000, Gansu, Peoples R China..
    Liu, Y. B.
    Nankai Univ, Tianjin 300071, Peoples R China..
    Liu, Y. Y.
    Nankai Univ, Tianjin 300071, Peoples R China..
    Liu, Z. A.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Liu, Zhiqing
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Long, Y. F.
    Peking Univ, Beijing 100871, Peoples R China..
    Lou, X. C.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Texas Dallas, Richardson, TX 75083 USA..
    Lu, H. J.
    Huangshan Coll, Huangshan 245000, Peoples R China..
    Lu, J. G.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Lu, Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Lu, Y. P.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Luo, C. L.
    Nanjing Normal Univ, Nanjing 210023, Jiangsu, Peoples R China..
    Luo, M. X.
    Zhejiang Univ, Hangzhou 310027, Zhejiang, Peoples R China..
    Luo, T.
    Univ Hawaii, Honolulu, HI 96822 USA..
    Luo, X. L.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Lyu, X. R.
    Univ Chinese Acad Sci, Beijing 100049, Peoples R China..
    Ma, F. C.
    Liaoning Univ, Shenyang 110036, Liaoning, Peoples R China..
    Ma, H. L.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Ma, L. L.
    Shandong Univ, Jinan 250100, Shandong, Peoples R China..
    Ma, M. M.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Ma, Q. M.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Ma, T.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Ma, X. N.
    Nankai Univ, Tianjin 300071, Peoples R China..
    Ma, X. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Ma, Y. M.
    Shandong Univ, Jinan 250100, Shandong, Peoples R China..
    Maas, F. E.
    Helmholtz Inst Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Maggiora, M.
    Univ Turin, I-10125 Turin, Italy.;INFN, I-10125 Turin, Italy..
    Malik, Q. A.
    Univ Punjab, Lahore, Pakistan..
    Mao, Y. J.
    Peking Univ, Beijing 100871, Peoples R China..
    Mao, Z. P.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Marcello, S.
    Univ Turin, I-10125 Turin, Italy.;INFN, I-10125 Turin, Italy..
    Messchendorp, J. G.
    Univ Groningen, KVI CART, NL-9747 AA Groningen, Netherlands..
    Mezzadri, G.
    Univ Ferrara, I-44122 Ferrara, Italy..
    Min, J.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Min, T. J.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Mitchell, R. E.
    Indiana Univ, Bloomington, IN 47405 USA..
    Mo, X. H.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Mo, Y. J.
    Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China..
    Morales, C. Morales
    Helmholtz Inst Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Morello, G.
    INFN Lab Nazl Frascati, I-00044 Frascati, Italy..
    Muchnoi, N. Yu.
    GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia.;Novosibirsk State Univ, Novosibirsk 630090, Russia..
    Muramatsu, H.
    Univ Minnesota, Minneapolis, MN 55455 USA..
    Musiol, P.
    Ruhr Univ Bochum, D-44780 Bochum, Germany..
    Mustafa, A.
    Ruhr Univ Bochum, D-44780 Bochum, Germany..
    Nefedov, Y.
    Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia..
    Nerling, F.
    GSI Helmholtzcentre Heavy Ion Res GmbH, D-64291 Darmstadt, Germany..
    Nikolaev, I. B.
    GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia.;Novosibirsk State Univ, Novosibirsk 630090, Russia..
    Ning, Z.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Nisar, S.
    COMSATS Inst Informat Technol, Def Rd,Raiwind Rd, Lahore, Pakistan..
    Niu, S. L.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Niu, X. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Olsen, S. L.
    Seoul Natl Univ, Seoul 151747, South Korea..
    Ouyang, Q.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Pacetti, S.
    INFN, I-06100 Perugia, Italy.;Univ Perugia, I-06100 Perugia, Italy..
    Pan, Y.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Patteri, P.
    INFN Lab Nazl Frascati, I-00044 Frascati, Italy..
    Pelizaeus, M.
    Ruhr Univ Bochum, D-44780 Bochum, Germany..
    Pellegrino, J.
    Univ Turin, I-10125 Turin, Italy.;INFN, I-10125 Turin, Italy..
    Peng, H. P.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Peters, K.
    GSI Helmholtzcentre Heavy Ion Res GmbH, D-64291 Darmstadt, Germany.;Goethe Univ Frankfurt, D-60323 Frankfurt, Germany..
    Pettersson, Joachim
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Ping, J. L.
    Nanjing Normal Univ, Nanjing 210023, Jiangsu, Peoples R China..
    Ping, R. G.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Poling, R.
    Univ Minnesota, Minneapolis, MN 55455 USA..
    Prasad, V.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Qi, H. R.
    Beihang Univ, Beijing 100191, Peoples R China..
    Qi, M.
    Nanjing Univ, Nanjing 210093, Jiangsu, Peoples R China..
    Qian, S.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Qiao, C. F.
    Univ Chinese Acad Sci, Beijing 100049, Peoples R China..
    Qin, J. J.
    Univ Chinese Acad Sci, Beijing 100049, Peoples R China..
    Qin, N.
    Wuhan Univ, Wuhan 430072, Hubei, Peoples R China..
    Qin, X. S.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Qin, Z. H.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Qiu, J. F.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Rashid, K. H.
    Univ Punjab, Lahore, Pakistan..
    Redmer, C. F.
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Richter, M.
    Ruhr Univ Bochum, D-44780 Bochum, Germany..
    Ripka, M.
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Rong, G.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Rosner, Ch
    Helmholtz Inst Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Ruan, X. D.
    Guangxi Univ, Nanning 530004, Peoples R China..
    Sarantsev, A.
    Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia.;PNPI, NRC Kurchatov Inst, Gatchina 188300, Russia..
    Savrie, M.
    Univ Ferrara, I-44122 Ferrara, Italy..
    Schnier, C.
    Ruhr Univ Bochum, D-44780 Bochum, Germany..
    Schönning, Karin
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Shan, W.
    Peking Univ, Beijing 100871, Peoples R China..
    Shao, M.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Shen, C. P.
    Beihang Univ, Beijing 100191, Peoples R China..
    Shen, P. X.
    Nankai Univ, Tianjin 300071, Peoples R China..
    Shen, X. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Sheng, H. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Song, J. J.
    Shandong Univ, Jinan 250100, Shandong, Peoples R China..
    Song, X. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Sosio, S.
    Univ Turin, I-10125 Turin, Italy.;INFN, I-10125 Turin, Italy..
    Sowa, C.
    Ruhr Univ Bochum, D-44780 Bochum, Germany..
    Spataro, S.
    Sun, G. X.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Sun, J. F.
    Henan Normal Univ, Xinxiang 453007, Peoples R China..
    Sun, S. S.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Sun, X. H.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Sun, Y. J.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Sun, Y. K.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Sun, Y. Z.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Sun, Z. J.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Sun, Z. T.
    Indiana Univ, Bloomington, IN 47405 USA..
    Tang, C. J.
    Sichuan Univ, Chengdu 610064, Sichuan, Peoples R China..
    Tang, G. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Tang, X.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Tapan, I.
    Uludag Univ, TR-16059 Bursa, Turkey..
    Tiemens, M.
    Univ Groningen, KVI CART, NL-9747 AA Groningen, Netherlands..
    Tsednee, B. T.
    Inst Phys & Technol, Peace Ave 54B, Ulaanbaatar 13330, Mongol Peo Rep..
    Uman, I.
    Near East Univ, Nicosia 10, North Cyprus, Turkey..
    Varner, G. S.
    Univ Hawaii, Honolulu, HI 96822 USA..
    Wang, B.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Wang, B. L.
    Univ Chinese Acad Sci, Beijing 100049, Peoples R China..
    Wang, D.
    Peking Univ, Beijing 100871, Peoples R China..
    Wang, D. Y.
    Peking Univ, Beijing 100871, Peoples R China..
    Wang, Dan
    Univ Chinese Acad Sci, Beijing 100049, Peoples R China..
    Wang, K.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Wang, L. L.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Wang, L. S.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Wang, M.
    Shandong Univ, Jinan 250100, Shandong, Peoples R China..
    Wang, P.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Wang, P. L.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Wang, W. P.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Wang, X. F.
    Tsinghua Univ, Beijing 100084, Peoples R China..
    Wang, Y. D.
    Helmholtz Inst Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Wang, Y. F.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Wang, Y. Q.
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Wang, Z.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Wang, Z. G.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Wang, Z. H.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Wang, Z. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Weber, T.
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Wei, D. H.
    Guangxi Normal Univ, Guilin 541004, Peoples R China..
    Weidenkaff, P.
    Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
    Wen, S. P.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Wiedner, U.
    Ruhr Univ Bochum, D-44780 Bochum, Germany..
    Wolke, Magnus
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Wu, L. H.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Wu, L. J.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Wu, Z.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Xia, L.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Xia, Y.
    Hunan Univ, Changsha 410082, Hunan, Peoples R China..
    Xiao, D.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Xiao, H.
    Univ South China, Hengyang 421001, Peoples R China..
    Xiao, Y. J.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Xiao, Z. J.
    Nanjing Normal Univ, Nanjing 210023, Jiangsu, Peoples R China..
    Xie, Y. G.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Xie, Y. H.
    Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China..
    Xiong, X. A.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Xiu, Q. L.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Xu, G. F.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Xu, J. J.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Xu, L.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Xu, Q. J.
    Hangzhou Normal Univ, Hangzhou 310036, Zhejiang, Peoples R China..
    Xu, Q. N.
    Univ Chinese Acad Sci, Beijing 100049, Peoples R China..
    Xu, X. P.
    Soochow Univ, Suzhou 215006, Peoples R China..
    Yan, L.
    Univ Turin, I-10125 Turin, Italy.;INFN, I-10125 Turin, Italy..
    Yan, W. B.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Yan, W. C.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Yan, Y. H.
    Hunan Univ, Changsha 410082, Hunan, Peoples R China..
    Yang, H. J.
    Shanghai Jiao Tong Univ, Shanghai 200240, Peoples R China.;Minist Educ, Key Lab Particle Phys Astrophys & Cosmol, Shanghai 200240, Peoples R China.;Shanghai Key Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China.;Inst Nucl & Particle Phys, Shanghai 200240, Peoples R China..
    Yang, H. X.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Yang, L.
    Wuhan Univ, Wuhan 430072, Hubei, Peoples R China..
    Yang, Y. H.
    Nanjing Univ, Nanjing 210093, Jiangsu, Peoples R China..
    Yang, Y. X.
    Guangxi Normal Univ, Guilin 541004, Peoples R China..
    Ye, M.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Ye, M. H.
    China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China..
    Yin, J. H.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    You, Z. Y.
    Sun Yat Sen Univ, Guangzhou 510275, Guangdong, Peoples R China..
    Yu, B. X.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Yu, C. X.
    Nankai Univ, Tianjin 300071, Peoples R China..
    Yu, J. S.
    Lanzhou Univ, Lanzhou 730000, Gansu, Peoples R China..
    Yuan, C. Z.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Yuan, Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Yuncu, A.
    Istanbul Bilgi Univ, TR-34060 Istanbul, Turkey.;Bogazici Univ, TR-34342 Istanbul, Turkey..
    Zafar, A. A.
    Univ Punjab, Lahore, Pakistan..
    Zeng, Y.
    Hunan Univ, Changsha 410082, Hunan, Peoples R China..
    Zeng, Z.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Zhang, B. X.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhang, B. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Zhang, C. C.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhang, D. H.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhang, H. H.
    Sun Yat Sen Univ, Guangzhou 510275, Guangdong, Peoples R China..
    Zhang, H. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Zhang, J.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhang, J. L.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhang, J. Q.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhang, J. W.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Zhang, J. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhang, J. Z.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhang, K.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhang, L.
    Tsinghua Univ, Beijing 100084, Peoples R China..
    Zhang, S. Q.
    Nankai Univ, Tianjin 300071, Peoples R China..
    Zhang, X. Y.
    Shandong Univ, Jinan 250100, Shandong, Peoples R China..
    Zhang, Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhang, Y. H.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Zhang, Y. T.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Zhang, Yu
    Univ Chinese Acad Sci, Beijing 100049, Peoples R China..
    Zhang, Z. H.
    Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China..
    Zhang, Z. P.
    Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Zhang, Z. Y.
    Wuhan Univ, Wuhan 430072, Hubei, Peoples R China..
    Zhao, G.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhao, J. W.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Zhao, J. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhao, J. Z.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Zhao, Lei
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Zhao, Ling
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhao, M. G.
    Nankai Univ, Tianjin 300071, Peoples R China..
    Zhao, Q.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhao, S. J.
    Zhengzhou Univ, Zhengzhou 450001, Henan, Peoples R China..
    Zhao, T. C.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhao, Y. B.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Zhao, Z. G.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Zhemchugov, A.
    Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia.;Moscow Inst Phys & Technol, Moscow 141700, Russia..
    Zheng, B.
    Univ South China, Hengyang 421001, Peoples R China..
    Zheng, J. P.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Zheng, W. J.
    Shandong Univ, Jinan 250100, Shandong, Peoples R China..
    Zheng, Y. H.
    Univ Chinese Acad Sci, Beijing 100049, Peoples R China..
    Zhong, B.
    Nanjing Normal Univ, Nanjing 210023, Jiangsu, Peoples R China..
    Zhou, L.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Zhou, X.
    Wuhan Univ, Wuhan 430072, Hubei, Peoples R China..
    Zhou, X. K.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Zhou, X. R.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Zhou, X. Y.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhou, Y. X.
    Guangxi Univ, Nanning 530004, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Zhu, K.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhu, K. J.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Zhu, S.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhu, S. H.
    Univ Sci & Technol Liaoning, Anshan 114051, Peoples R China..
    Zhu, X. L.
    Tsinghua Univ, Beijing 100084, Peoples R China..
    Zhu, Y. C.
    State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China.;Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China..
    Zhu, Y. S.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhu, Z. A.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zhuang, J.
    Inst High Energy Phys, Beijing 100049, Peoples R China.;State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China..
    Zotti, L.
    Univ Turin, I-10125 Turin, Italy.;INFN, I-10125 Turin, Italy..
    Zou, B. S.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Zou, J. H.
    Inst High Energy Phys, Beijing 100049, Peoples R China..
    Measurement of e+e−→π0π0ψ(3686) at √s from 4.009 to 4.600 GeV and observation of a neutral charmoniumlike structure2018Ingår i: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 97, nr 5, artikel-id 052001Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Using ethorne-collision data collected with the BESIII detector at the BEPCII collider corresponding to an integrated luminosity of 5.2 fb(-1) at center-of-mass energies (root s) from 4.009 to 4.600 GeV, the process e(+)e(-) -> pi(0)pi(0)psi(3686) is studied for the first time. The corresponding Born cross sections are measured and found to be half of those of the reaction e(+)e(-) -> pi(0)pi(0)psi(3686). This is consistent with the expectation from isospin symmetry. Furthermore, the Dalitz plots for pi(0)pi(0)psi(3686) are accordant with those of pi(0)pi(0)psi(3686) at all energy points, and a neutral analog to the structure in pi(+/-)psi(3686) around 4040 MeV/c(2) first observed at root s = 4.416 GeV is observed in the isospin neutral mode at the same energy.

  • Disputation: 2018-06-12 09:00 Konferensrummet, Uppsala
    Wang, Juan
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för medicinska vetenskaper, Arbets- och miljömedicin.
    Asthma and Rhinitis among Adults in Sweden and China: Risk Factors in the Home Environment2018Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    The main aim of this thesis was to evaluate associations between selected home environment factors and asthma, rhinitis and respiratory symptoms among adults from Sweden, China and northern Europe. Two studies were performed in Sweden, one in China, and one longitudinal cohort study was performed in northern Europe. Dampness/mould was common, and was a main risk factor in all studies. Other risk factors for asthma symptoms in Sweden included window pane condensation in winter, multi-family buildings constructed from 1961-1975, rented apartments, environment tobacco smoke (ETS), and living in a colder climate zone. Higher ventilation flow in Sweden was associated with less asthma symptoms. Risk factors for rhinitis in Sweden included window pane condensation, a higher moisture load, concrete slab foundation constructed before 1991, multi-family buildings constructed from 1976-1985, rented apartments and living in densely populated areas. Risk factors for rhinitis in China included window pane condensation, recent redecoration, new furniture, presence of cockroaches, pet keeping, ETS and living near a main road or highway. Frequently cleaning of the home and putting beddings to sunshine were protective factors for rhinitis in China. Other risk factors for respiratory infections in Sweden included houses with a brick façade, window pane condensation, a higher moisture load, multi-family buildings constructed from 1976-1985, rented apartments and living in densely populated areas. Furthermore, dampness and mould, and mould odour were risk factors for onset of asthma and rhinitis in northern Europe. In conclusion, indoor dampness and mould can be a risk factor for asthma and rhinitis in Sweden, China and northern Europe. Certain construction years (1961-1985), ETS, recent redecoration, new furniture, living in urban areas and exposure to traffic air pollution can be risk factors for asthma, rhinitis or respiratory infections. A high ventilation flow and daily cleaning at home can be protective.

    Delarbeten
    1. Rhinitis Symptoms and Asthma among Parents of Preschool Children in Relation to the Home Environment in Chongqing, China
    Öppna denna publikation i ny flik eller fönster >>Rhinitis Symptoms and Asthma among Parents of Preschool Children in Relation to the Home Environment in Chongqing, China
    Visa övriga...
    2014 (Engelska)Ingår i: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 9, nr 4, s. e94731-Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Risk factors for rhinitis and asthma in the home environment were studied by a questionnaire survey. Parents of 4530 1-8 year old children (one parent per child) from randomly selected kindergartens in Chongqing, China participated. 70.4% were females; 47.1% had rhinitis symptoms in the last three months (current rhinitis, CR); 1.6% reported a history of allergic asthma (AA); 2.7% reported a history of allergic rhinitis (AR); 16.4% were current smokers; 50.8% males and 2.4% females were current smokers. Stuffy odor, unpleasant odor, tobacco smoke odor and dry air were associated with CR (adjustment for gender, current smoking and other perceptions of odor or humidity). Associations between home environment and CR, AR, and AA were studied by multiple logistic regression analyses, adjusting for gender, current smoking and other significant home factors. Living near a main road or highway was a risk factor for both CR (OR(95% CI): 1.31(1.13,1.52)) and AR (OR(95% CI): 2.44(1.48,4.03)). Other risk factors for CR included living in rural areas (OR(95% CI): 1.43(1.10,1.85)), new furniture (OR(95% CI): 1.28(1.11,1.49)), water damage (OR(95% CI): 1.68(1.29,2.18)), cockroaches (OR(95% CI): 1.46(1.23,1.73)), and keeping pets (OR(95% CI): 1.24(1.04,1.49)). Other risk factors for AR included redecoration (OR(95% CI): 2.14(1.34,3.41)), mold spots (OR(95% CI): 2.23(1.06,4.68)), window pane condensation (OR(95% CI): 2.04(1.28,3.26)). Water damage was the only home factor associated with AA (2.56(1.34,4.86)). Frequently put bedding to sunshine was protective for CR (OR(95% CI): 0.79(0.68,0.92); cleaning every day was protective for AR (OR(95% CI): 0.40(0.22,0.71)). In conclusion, parents' CR and AR were related to a number of factors of the home environment.

    Nationell ämneskategori
    Lungmedicin och allergi
    Identifikatorer
    urn:nbn:se:uu:diva-228494 (URN)10.1371/journal.pone.0094731 (DOI)000336970400086 ()
    Tillgänglig från: 2014-07-15 Skapad: 2014-07-15 Senast uppdaterad: 2018-04-06Bibliografiskt granskad
    2. Rhinitis, Asthma and Respiratory Infections among Adults in Relation to the Home Environment in Multi-Family Buildings in Sweden
    Öppna denna publikation i ny flik eller fönster >>Rhinitis, Asthma and Respiratory Infections among Adults in Relation to the Home Environment in Multi-Family Buildings in Sweden
    2014 (Engelska)Ingår i: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 9, nr 8, s. e105125-Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Risk factors for rhinitis, asthma and respiratory infections in the home environment were studied by a questionnaire survey. Totally 5775 occupants (>= 18 years old) from a stratified random sample of multi-family buildings in Sweden participated (46%). 51.0% had rhinitis in the last 3 months (current rhinitis); 11.5% doctor diagnosed asthma; 46.4% respiratory infections in the last 3 months and 11.9% antibiotic medication for respiratory infections in the last 12 months. Associations between home environment and health were analyzed by multiple logistic regression, controlling for gender, age and smoking and mutual adjustment. Buildings constructed during 1960-1975 were risk factors for day time breathlessness (OR = 1.53, 95%CI 1.03-2.29). And those constructed during 1976-1985 had more current rhinitis (OR = 1.43, 95%CI 1.12-1.84) and respiratory infections (OR = 1.46, 95%CI 1.21-1.78). Cities with higher population density had more current rhinitis (p = 0.008) and respiratory infections (p<0.001). Rented apartments had more current rhinitis (OR = 1.23, 95%CI 1.07-1.40), wheeze (OR = 1.20, 95%CI 1.02-1.41), day time breathlessness (OR = 1.31, 95%CI 1.04-1.66) and respiratory infections (OR = 1.13, 95%CI 1.01-1.26). Living in colder parts of the country was a risk factor for wheeze (p = 0.03) and night time breathlessness (p = 0.002). Building dampness was a risk factor for wheeze (OR = 1.42, 95%CI 1.08-1.86) and day time breathlessness (OR = 1.57, 95%CI 1.09-2.27). Building dampness was a risk factor for health among those below 66 years old. Odor at home was a risk factor for doctor diagnosed asthma (OR = 1.49, 95%CI 1.08-2.06) and current asthma (OR = 1.52, 95%CI 1.03-2.24). Environmental tobacco smoke (ETS) was a risk factor for current asthma (OR = 1.53, 95%CI 1.09-2.16). Window pane condensation was a risk factor for antibiotic medication for respiratory infections (OR = 1.41, 95%CI 1.10-1.82). In conclusion, rhinitis, asthma and respiratory infections were related to a number of factors in the home environment. Certain building years (1961-1985), building dampness, window pane condensation and odor in the dwelling may be risk factors.

    Nationell ämneskategori
    Arbetsmedicin och miljömedicin
    Identifikatorer
    urn:nbn:se:uu:diva-232599 (URN)10.1371/journal.pone.0105125 (DOI)000340742100066 ()
    Tillgänglig från: 2014-09-24 Skapad: 2014-09-22 Senast uppdaterad: 2018-04-06Bibliografiskt granskad
    3. Current wheeze, asthma, respiratory infections, and rhinitis among adults in relation to inspection data and indoor measurements in single-family houses in Sweden - The BETSI study
    Öppna denna publikation i ny flik eller fönster >>Current wheeze, asthma, respiratory infections, and rhinitis among adults in relation to inspection data and indoor measurements in single-family houses in Sweden - The BETSI study
    Visa övriga...
    2017 (Engelska)Ingår i: Indoor Air, ISSN 0905-6947, E-ISSN 1600-0668, Vol. 27, nr 4, s. 725-736Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    In the Swedish Building Energy, Technical Status and Indoor environment study, a total of 1160 adults from 605 single-family houses answered a questionnaire on respiratory health. Building inspectors investigated the homes and measured temperature, air humidity, air exchange rate, and wood moisture content (in attic and crawl space). Moisture load was calculated as the difference between indoor and outdoor absolute humidity. Totally, 7.3% were smokers, 8.7% had doctor' diagnosed asthma, 11.2% current wheeze, and 9.5% current asthma symptoms. Totally, 50.3% had respiratory infections and 26.0% rhinitis. The mean air exchange rate was 0.36/h, and the mean moisture load 1.70g/m(3). Damp foundation (OR=1.79, 95% CI 1.16-2.78) was positively associated while floor constructions with crawl space (OR=0.49, 95% CI 0.29-0.84) was negatively associated with wheeze. Concrete slabs with overlying insulation (OR=2.21, 95% CI 1.24-3.92) and brick facade (OR=1.71, 95% CI 1.07-2.73) were associated with rhinitis. Moisture load was associated with respiratory infections (OR=1.21 per 1g/m(3), 95% CI 1.04-1.40) and rhinitis (OR=1.36 per 1g/m(3), 95% CI 1.02-1.83). Air exchange rate was associated with current asthma symptoms (OR=0.85 per 0.1/h, 95% CI 0.73-0.99). Living in homes with damp foundation, concrete slabs with overlying insulation, brick facade, low ventilation flow, and high moisture load are risk factors for asthma, rhinitis, and respiratory infections.

    Ort, förlag, år, upplaga, sidor
    WILEY, 2017
    Nyckelord
    asthma, building dampness, indoor environment, mold, rhinitis, ventilation flow
    Nationell ämneskategori
    Medicin och hälsovetenskap
    Identifikatorer
    urn:nbn:se:uu:diva-328991 (URN)10.1111/ina.12363 (DOI)000403895400003 ()28005296 (PubMedID)
    Forskningsfinansiär
    Boverket, 2012-1104
    Tillgänglig från: 2017-09-08 Skapad: 2017-09-08 Senast uppdaterad: 2018-04-06Bibliografiskt granskad
    4. Adult onset and remission of respiratory symptoms, asthma and rhinitis in relation to dampness, mould and mould odour: the RHINE cohort
    Öppna denna publikation i ny flik eller fönster >>Adult onset and remission of respiratory symptoms, asthma and rhinitis in relation to dampness, mould and mould odour: the RHINE cohort
    Visa övriga...
    (Engelska)Ingår i: Artikel i tidskrift (Övrigt vetenskapligt) Submitted
    Nationell ämneskategori
    Medicin och hälsovetenskap
    Identifikatorer
    urn:nbn:se:uu:diva-347692 (URN)
    Tillgänglig från: 2018-04-06 Skapad: 2018-04-06 Senast uppdaterad: 2018-04-06
  • Camino-Serrano, Marta
    et al.
    Guenet, Bertrand
    Luyssaert, Sebastiaan
    Ciais, Philippe
    Bastrikov, Vladislav
    De Vos, Bruno
    Gielen, Bert
    Gleixner, Gerd
    Jornet-Puig, Albert
    Kaiser, Klaus
    Kothawala, Dolly
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik, Limnologi.
    Lauerwald, Ronny
    Peñuelas, Josep
    Schrumpf, Marion
    Vicca, Sara
    Vuichard, Nicolas
    Walmsley, David
    Janssens, Ivan A.
    ORCHIDEE-SOM: Modeling soil organic carbon (SOC) and dissolved organic carbon (DOC) dynamics along vertical soil profiles in Europe2018Ingår i: Geoscientific Model Development, ISSN 1991-959X, E-ISSN 1991-9603, Vol. 11, nr 3, s. 937-957Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Current Land Surface Models (LSMs) typically represent soils in a very simplistic way, assuming soil organic carbon (SOC) as a bulk, thus impeding a correct representation of deep soil carbon dynamics. Moreover, LSMs generally neglect the production and export of dissolved organic carbon (DOC) from soils to rivers, leading to overestimations of the potential carbon sequestration on land. These common oversimplified processing of SOC in LSMs is partly responsible for the large uncertainty in the predictions of the soil carbon response to climate change. In this study, we present a new soil carbon module called ORCHIDEE-SOM, embedded within the land surface model ORCHIDEE, which is able to reproduce the DOC and SOC dynamics in a vertically discretized soil to two meters. The model includes processes of biological production and consumption of SOC and DOC, DOC adsorption on- and desorption from soil minerals, diffusion of SOC and DOC and DOC transport with water through and out of the soils to rivers. We evaluated ORCHIDEE-SOM against observations of DOC concentrations and SOC stocks from four European sites with different vegetation covers: a coniferous forest, a deciduous forest, a grassland and a cropland. The model was able to reproduce the SOC stocks along their vertical profiles at the four sites and the DOC concentrations within the range of measurements, with the exception of the DOC concentrations in the upper soil horizon at the coniferous forest. However, the model was not able to fully capture the temporal dynamics of DOC concentrations. Further model improvements should focus on a plant- and depth- dependent parameterization of the new input model parameters, such as the decomposition times of DOC and the microbial carbon use efficiency. We suggest that this new soil module, when parameterized for global simulations, will improve the representation of the global carbon cycle in LSMs, thus helping to constrain the predictions of the future SOC response to global warming.\textless/p\textgreater

  • Krizsan, Sophie J
    et al.
    Swedish University of Agricultural Sciences, Umeå, Sweden.
    Mateos-Rivera, Alejandro
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik, Limnologi.
    Bertilsson, Stefan
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik, Limnologi.
    Felton, Annika
    Swedish University of Agricultural Sciences, Alnarp, Sweden.
    Anttila, Anne
    Helsinki University, Helsinki, Finland.
    Ramin, Mohammad
    Swedish University of Agricultural Sciences, Umeå, Sweden.
    Vaga, Merko
    Swedish University of Agricultural Sciences, Umeå, Sweden.
    Gidlund, Helena
    Swedish University of Agricultural Sciences, Umeå, Sweden.
    Huhtanen, Pekka
    Swedish University of Agricultural Sciences, Umeå, Sweden.
    An in vitro evaluation of browser and grazer fermentation efficiency and microbiota using European moose spring and summer foods2018Ingår i: Ecology and Evolution, ISSN 2045-7758, E-ISSN 2045-7758, Vol. 8, s. 4183-4196Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Evolutionary morphological and physiological differences between browsers and grazers contribute to species- specific digestion efficiency of food resources. Rumen microbial community structure of browsers is supposedly adapted to characteristic nutrient composition of the diet source. If this assumption is correct, domesticated ruminants, or grazers, are poor model animals for assessing the nutritional value of food consumed by browsing game species. In this study, typical spring and summer foods of the European moose (Alces alces) were combined with rumen fluid collected from both dairy cows (Bos taurus) and from moose, with the aim of comparing fer- mentation efficiency and microbial community composition. The nutritional value of the food resources was characterized by chemical analysis and advanced in vitro measurements. The study also addressed whether or not feed evaluation based on in vitro techniques with cattle rumen fluid as inoculum could be a practical alternative when evaluating the nutritional value of plants consumed by wild browsers. Our re- sults suggest that the fermentation characteristics of moose spring and summer food are partly host- specific and related to the contribution of the bacterial phyla Firmicutes and Bacteriodetes to the rumen microbial community. Host- specific adaptations of the ruminal microbial community structure could be explained from the evolutionary adaptations related to feeding habitats and morphophysiological differences be- tween browsers and grazers. However, the observed overall differences in microbial community structure could not be related to ruminal digestion parameters measured in vitro. The in vitro evaluation of digestion efficiency reveals that equal amounts of methane were produced across all feed samples regardless of whether the ruminal fluid was from moose or dairy cow. The results of this study suggested that the nutri- tional value of browsers’ spring and summer food can be predicted using rumen fluid from domesticated grazers as inoculum in in vitro assessments of extent of digestion when excluding samples of the white water lily root, but not of fermentation characteristics as indicated by the proportions of individual fermentation fatty acids to the total of volatile fatty acids.

  • Jacobsen, Carsten Suhr
    et al.
    Nielsen, Tue Kjærgaard
    Vester, Jan Kjølhede
    Stougaard, Peter
    Nielsen, Jeppe Lund
    Voriskova, Jana
    Winding, Anne
    Baldrian, Petr
    Liu, Binbin
    Frostegård, Åsa
    Pedersen, Dorthe
    Tveit, Alexander Tøsdal
    Svenning, Mette Marianne
    Tebbe, Christoph C.
    Øvreås, Lise
    Jakobsen, Pia Bach
    Blazewicz, Steven J.
    Hubablek, Valerie
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik, Limnologi. Uppsala universitet, Science for Life Laboratory, SciLifeLab.
    Bertilsson, Stefan
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik, Limnologi. Uppsala universitet, Science for Life Laboratory, SciLifeLab.
    Hansen, Lars Hestbjerg
    Cary, S. Craig
    Holben, William E.
    Ekelund, Flemming
    Bælum, Jacob
    Inter-laboratory testing of the effect of DNA blocking reagent G2 on DNA extraction from low-biomass clay samples2018Ingår i: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 8, artikel-id 5711Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Here we show that a commercial blocking reagent (G2) based on modified eukaryotic DNA significantly improved DNA extraction efficiency. We subjected G2 to an inter-laboratory testing, where DNA was extracted from the same clay subsoil using the same batch of kits. The inter-laboratory extraction campaign revealed large variation among the participating laboratories, but the reagent increased the number of PCR-amplified16S rRNA genes recovered from biomass naturally present in the soils by one log unit. An extensive sequencing approach demonstrated that the blocking reagent was free of contaminating DNA, and may therefore also be used in metagenomics studies that require direct sequencing.

  • Young, Joanna C.
    et al.
    Univ Alaska, Geophys Inst, Fairbanks, AK 99701 USA..
    Arendt, Anthony
    Univ Alaska, Geophys Inst, Fairbanks, AK 99701 USA.;Univ Washington, Polar Sci Ctr, Appl Phys Lab, Seattle, WA 98195 USA..
    Hock, Regine
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Luft-, vatten och landskapslära. Univ Alaska, Geophys Inst, Fairbanks, AK 99701 USA..
    Pettit, Erin
    Univ Alaska Fairbanks, Dept Geosci, Fairbanks, AK USA..
    The challenge of monitoring glaciers with extreme altitudinal range: mass-balance reconstruction for Kahiltna Glacier, Alaska2018Ingår i: Journal of Glaciology, ISSN 0022-1430, E-ISSN 1727-5652, Vol. 64, nr 243, s. 75-88Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Glaciers spanning large altitudinal ranges often experience different climatic regimes with elevation, creating challenges in acquiring mass-balance and climate observations that represent the entire glacier. We use mixed methods to reconstruct the 1991-2014 mass balance of the Kahiltna Glacier in Alaska, a large (503 km(2)) glacier with one of the greatest elevation ranges globally (264-6108m a. s.l.). We calibrate an enhanced temperature index model to glacier-wide mass balances from repeat laser altimetry and point observations, finding a mean net mass-balance rate of -0.74 mw.e. a(-1)(+/-sigma = 0.04, std dev. of the best-performing model simulations). Results are validated against mass changes from NASA's Gravity Recovery and Climate Experiment (GRACE) satellites, a novel approach at the individual glacier scale. Correlation is strong between the detrended model-and GRACE-derived mass change time series (R-2 = 0.58 and p << 0.001), and between summer (R-2 = 0.69 and p = 0.003) and annual (R-2 = 0.63 and p = 0.006) balances, lending greater confidence to our modeling results. We find poor correlation, however, between modeled glacier-wide balances and recent single-stake monitoring. Finally, we make recommendations for monitoring glaciers with extreme altitudinal ranges, including characterizing precipitation via snow radar profiling.

  • Liang, Feiyan
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - Ångström, Molekylär biomimetik.
    Englund, Elias
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - Ångström, Molekylär biomimetik.
    Lindberg, Pia
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - Ångström, Molekylär biomimetik.
    Lindblad, Peter
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - Ångström, Molekylär biomimetik.
    Engineered cyanobacteria with enhanced growth show increased ethanol production and higher biofuel to biomass ratio2018Ingår i: Metabolic engineering, ISSN 1096-7176, E-ISSN 1096-7184, Vol. 46, s. 51-59Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The Calvin-Benson-Bassham (CBB) cycle is the main pathway to fix atmospheric CO2 and store energy in carbon bonds, forming the precursors of most primary and secondary metabolites necessary for life. Speeding up the CBB cycle theoretically has positive effects on the subsequent growth and/or the end metabolite(s) production. Four CBB cycle enzymes, ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO), fructose-1,6/sedoheptulose-1,7-bisphosphatase (FBP/SBPase), transketolase (TK) and aldolase (FBA) were selected to be co-overexpressed with the ethanol synthesis enzymes pyruvate decarboxylase (PDC) and alcohol dehydrogenase (ADH) in the cyanobacterium Synechocystis PCC 6803. An inducible promoter, PnrsB, was used to drive PDC and ADH expression. When PnrsB was induced and cells were cultivated at 65 µmol photons m−2 s−1, the RuBisCO-, FBP/SBPase-, TK-, and FBA-expressing strains produced 55%, 67%, 37% and 69% more ethanol and 7.7%, 15.1%, 8.8% and 10.1% more total biomass (the sum of dry cell weight and ethanol), respectively, compared to the strain only expressing the ethanol biosynthesis pathway. The ethanol to total biomass ratio was also increased in CBB cycle enzymes overexpressing strains. This study experimentally demonstrates that using the cells with enhanced carbon fixation, when the product synthesis pathway is not the main bottleneck, can significantly increase the generation of a product (exemplified with ethanol), which acts as a carbon sink.

  • Gabrysch, Katja
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Matematiska institutionen, Analys och sannolikhetsteori.
    Thörnblad, Erik
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Matematiska institutionen, Analys och sannolikhetsteori.
    The greedy walk on an inhomogeneous Poisson process2018Ingår i: Electronic Communications in Probability, ISSN 1083-589X, E-ISSN 1083-589X, Vol. 23, artikel-id 14Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The greedy walk is a deterministic walk that always moves from its current position to the nearest not yet visited point. In this paper we consider the greedy walk on an inhomogeneous Poisson point process on the real line. We prove that the property of visiting all points of the point process satisfies a 0-1 law and determine explicit sufficient and necessary conditions on the mean measure of the point process for this to happen. Moreover, we provide precise results on threshold functions for the property of visiting all points.

  • Dyrssen, Hannah
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Matematiska institutionen.
    Ekström, Erik
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Matematiska institutionen, Analys och sannolikhetsteori.
    Sequential testing of a Wiener process with costly observations2018Ingår i: Sequential Analysis, ISSN 0747-4946, E-ISSN 1532-4176, Vol. 37, nr 1, s. 47-58Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We consider the sequential testing of two simple hypotheses for the drift of a Brownian motion when each observation of the underlying process is associated with a positive cost. In this setting where continuous monitoring of the underlying process is not feasible, the question is not only whether to stop or to continue at a given observation time but also, if continuing, how to distribute the next observation time. Adopting a Bayesian methodology, we show that the value function can be characterized as the unique fixed point of an associated operator and that it can be constructed using an iterative scheme. Moreover, the optimal sequential distribution of observation times can be described in terms of the fixed point.

  • Gould, Ernest
    et al.
    Aix Marseille Univ, EPV, IRD 190, INSERM 1207,EHESP, Marseille, France..
    Pettersson, John
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för medicinsk biokemi och mikrobiologi. Norwegian Inst Publ Hlth, Domain Infect Control & Environm Hlth, Dept Infect Dis Epidemiol & Modelling Mol Biol, Oslo, Norway..
    Higgs, Stephen
    Kansas State Univ, Diagnost Med & Pathobiol, Manhattan, KS 66506 USA.;Kansas State Univ, KS Biosecur Res Inst, Manhattan, KS 66506 USA..
    Charrel, Remi
    Aix Marseille Univ, EPV, IRD 190, INSERM 1207,EHESP, Marseille, France.;Inst Hosp Univ Mediterranee Infect, APHM Publ Hosp Marseille, Marseille, France..
    de Lamballerie, Xavier
    Aix Marseille Univ, EPV, IRD 190, INSERM 1207,EHESP, Marseille, France.;Inst Hosp Univ Mediterranee Infect, APHM Publ Hosp Marseille, Marseille, France..
    Emerging arboviruses: Why today?2017Ingår i: ONE HEALTH, ISSN 2352-7714, Vol. 4, s. 1-13Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    The recent global (re)emergence of arthropod-borne viruses (arboviruses), such as chikungunya and Zika virus, was widely reported in the media as though it was a new phenomenon. This is not the case. Arboviruses and other human microbial pathogens have been (re)emerging for centuries. The major difference today is that arbovirus emergence and dispersion are more rapid and geographically extensive, largely due to intensive growth of global transportation systems, arthropod adaptation to increasing urbanisation, our failure to contain mosquito population density increases and land perturbation. Here we select examples of (re)emerging pathogenic arboviruses and explain the reasons for their emergence and different patterns of dispersal, focusing particularly on the mosquito vectors which are important determinants of arbovirus emergence. We also attempt to identify arboviruses likely to (re)emerge in the future.

  • Disputation: 2018-06-13 13:15 Room Å4001, Uppsala
    Stegeby, Henrik
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - Ångström, Teoretisk kemi.
    MATTER-ANTIMATTER INTERACTIONS: The hydrogen-antihydrogen system and antiproton-matter interactions2018Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    Ever since antiparticles were discovered their nature has been something of a mystery. They were postulated to be identical to regular particles except for having opposite charge, but this would imply that an equal amount of antiparticles and particles should have been created at the beginning of time. However, everywhere we look the Universe seems to be constituted of regular particles, giving rise to the question whether there is something else that differentiates antiparticles from regular particles, or if there is something amiss in the Standard Model of particle physics.

    This thesis focuses on a central system of study in this field, the hydrogen-antihydrogen system and the theory surrounding it, as well as an expansion into systems with an antiproton interacting with small molecules, bridging the fields of quantum physics and quantum chemistry.

    Methods expanding on the Born-Oppenheimer approximation for the interaction between the two atoms are presented. The resulting 2-body interaction potential is then used for creating a part of the basis in a non-adiabatic 4-body method in order to look for resonance states whose existence could impact cross-sections of hydrogen-antihydrogen scattering. The eigenfunctions obtained from the non-adiabatic method are used by extracting the 2-body hadronic density function and comparing it to the adiabatic wave function, for measuring the adiabaticity of the hydrogen-antihydrogen system.

    The antiproton-matter interaction is first investigated by a quantum dynamical approach of an antiproton scattering on molecular hydrogen, common products in high-energy collision experiments, continued by a study of the potential energy surfaces of an antiproton interacting with a range of functional groups present in the human body.

    Delarbeten
    1. Impact of the strong force on the Coulombic decay of a hydrogen-antihydrogen molecule
    Öppna denna publikation i ny flik eller fönster >>Impact of the strong force on the Coulombic decay of a hydrogen-antihydrogen molecule
    2008 (Engelska)Ingår i: Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, E-ISSN 1361-6455, Vol. 41, nr 15, s. 155202-Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    The lifetime of the meta-stable hydrogen-antihydrogen molecule in various vibrational states is calculated. The partial lifetime with respect to the proton-antiproton annihilation is obtained from complex eigenvalues which arise upon inclusion of the strong force in the adiabatic formulation of the molecular decay problem. We study the influence of the strong force, which causes annihilation, on the transition probability for decay via Coulombic rearrangement to protonium and positronium.

    Nationell ämneskategori
    Kemi
    Identifikatorer
    urn:nbn:se:uu:diva-109174 (URN)10.1088/0953-4075/41/15/155202 (DOI)000258020000008 ()
    Tillgänglig från: 2009-10-09 Skapad: 2009-10-09 Senast uppdaterad: 2018-04-22
    2. Variational calculations for the hydrogen-antihydrogen system with a mass-scaled Born-Oppenheimer potential
    Öppna denna publikation i ny flik eller fönster >>Variational calculations for the hydrogen-antihydrogen system with a mass-scaled Born-Oppenheimer potential
    Visa övriga...
    2012 (Engelska)Ingår i: CENTRAL EUROPEAN JOURNAL OF PHYSICS, ISSN 1895-1082, Vol. 10, nr 5, s. 1038-1053Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    The problem of proton-antiproton motion in the H- system is investigated by means of the variational method. We introduce a modified nuclear interaction through mass-scaling of the Born-Oppenheimer potential. This improved treatment of the interaction includes the nondivergent part of the otherwise divergent adiabatic correction and shows the correct threshold behaviour. Using this potential we calculate the vibrational energy levels with angular momentum 0 and 1 and the corresponding nuclear wave functions, as well as the S-wave scattering length. We obtain a full set of all bound states together with a large number of discretized continuum states that might be utilized in variational four-body calculations. The results of our calculations gives an indication of resonance states in the hydrogen-antihydrogen system.

    Nyckelord
    antihydrogen; Born-Oppenheimer approximation; adiabatic approximation; matter-antimatter interactions
    Nationell ämneskategori
    Teoretisk kemi
    Identifikatorer
    urn:nbn:se:uu:diva-188930 (URN)10.2478/s11534-012-0131-y (DOI)000311496400002 ()
    Tillgänglig från: 2012-12-21 Skapad: 2012-12-21 Senast uppdaterad: 2018-04-22Bibliografiskt granskad
    3. Resonance states in the hydrogen-antihydrogen system from a nonadiabatic treatment
    Öppna denna publikation i ny flik eller fönster >>Resonance states in the hydrogen-antihydrogen system from a nonadiabatic treatment
    2016 (Engelska)Ingår i: Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, E-ISSN 1361-6455, Vol. 49, nr 1, artikel-id 014002Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    The quantum-mechanical four-body problem for the hydrogen-antihydrogen system has been solved by means of the variational implementation of the coupled-arrangement channel method. Wave functions have been formed using the Gaussian expansion method (GEM) in Jacobi coordinates; they explicitly include components corresponding to the rearrangement from hydrogen and antihydrogen (H + (H) over bar into protonium and positronium (Pn + Ps). We analyze the solutions belonging to the discretized spectrum of the four-body eigenvalue problem, searching for resonance states at energies just below the H-(H) over bar dissociation energy threshold by means of the stabilization method and complex scaling.

    Nyckelord
    antimatter, resonance, hydrogen-antihydrogen, few-body system, stability method, complex scaling
    Nationell ämneskategori
    Fysikalisk kemi
    Identifikatorer
    urn:nbn:se:uu:diva-274895 (URN)10.1088/0953-4075/49/1/014002 (DOI)000367153800003 ()
    Forskningsfinansiär
    Wenner-Gren StiftelsernaVetenskapsrådet
    Tillgänglig från: 2016-02-02 Skapad: 2016-01-26 Senast uppdaterad: 2018-04-22Bibliografiskt granskad
    4. Wave packet simulations of antiproton scattering on molecular hydrogen
    Öppna denna publikation i ny flik eller fönster >>Wave packet simulations of antiproton scattering on molecular hydrogen
    2015 (Engelska)Ingår i: Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, E-ISSN 1361-6455, Vol. 48, nr 19, s. 195204:1-7, artikel-id 195204Artikel i tidskrift (Refereegranskat) Published
    Nationell ämneskategori
    Teoretisk kemi Beräkningsmatematik
    Identifikatorer
    urn:nbn:se:uu:diva-261547 (URN)10.1088/0953-4075/48/19/195204 (DOI)000361036700011 ()
    Projekt
    eSSENCE
    Tillgänglig från: 2015-08-28 Skapad: 2015-09-01 Senast uppdaterad: 2018-04-22Bibliografiskt granskad
  • Aaboud, M.
    et al.
    Univ Mohamed Premier, Fac Sci, Oujda, Morocco.;LPTPM, Oujda, Morocco..
    Bergeås Kuutmann, Elin
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Bokan, Petar
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik. Georg August Univ, Phys Inst 2, Gottingen, Germany.
    Brenner, Richard
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Ekelöf, Tord
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Ellert, Mattias
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Ferrari, Arnaud
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Gradin, Joakim
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Isacson, Max
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Mårtensson, Mikael
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Öhman, Henrik
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Sales De Bruin, Pedro
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Zwalinski, L.
    CERN, Geneva, Switzerland..
    Measurement of differential cross-sections of a single top quark produced in association with a W boson at √s=13TeV with ATLAS2018Ingår i: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 78, nr 3, artikel-id 186Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The differential cross-section for the production of a W boson in association with a top quark is measured for several particle-level observables. The measurements are performed using 36.1 fb(-1) of pp collision data collected with the ATLAS detector at the LHC in 2015 and 2016. Differential cross-sections are measured in a fiducial phase space defined by the presence of two charged leptons and exactly one jet matched to a b-hadron, and are normalised with the fiducial cross-section. Results are found to be in good agreement with predictions from several Monte Carlo event generators.

  • Disputation: 2018-06-08 13:00 Sal X, Uppsala
    Larsson, Germund
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Fakulteten för utbildningsvetenskaper, Institutionen för pedagogik, didaktik och utbildningsstudier.
    Förbrytelser och förvisningar: Bestraffningssystemet i de svenska läroverken 1905–19612018Doktorsavhandling, monografi (Övrigt vetenskapligt)
    Abstract [en]

    The aim of this dissertation is to analyse the system of punishment at the upper secondary schools in Sweden during the twentieth century. The main research question is: how did the system of punishment function and change from 1905 to 1961? The investigations concentrate on the offences committed, the spatial features of the jurisdiction, the agents involved, as well as the systems of meaning that underscored the penal process. The analysis is mainly founded upon an extensive source material comprehending all expulsion cases at the upper secondary schools during the period.

    The dissertation enriches our understanding of how the system of punishment operated during the twentieth century. The pupil and his or her morals and conduct were at the heart of the system of punishment. It is shown that the hardest punishment, the expulsion, was not only passed for the most severe offences, but also for more banal infractions. Furthermore, the juridical system of the upper secondary schools stretched far beyond the physical milieu of the school yard. Offences committed in the public arena of the town, as well as the private institution of the household, stood grounds for excluding a pupil. Additionally, the relative importance of different types of agents that enacted the system changed over time. Headmasters and teachers were successively accompanied by new agents such as school physicians, the child protection agency as well as modern law enforcement personnel. Finally, the rationality – the historically specific system of meaning underlying the judgment of pupils’ offences – behind the decisions to issue the hardest punishment is examined. Ideas of conduct relating to gender and social class, values concerning truthfulness and deceitfulness, as well as ideas of physical attributes and their connection to intelligence and mental decease, all played parts in the examination of the offending pupils. In the end, the dissertation argues that the system of punishment was something more, and something else, then a mere part of the pedagogical practise of the upper secondary schools. In the system of punishment, internal school traditions converged with partially contradictory tendencies within society at large.

  • Disputation: 2018-06-12 09:00 Å2001, Uppsala
    Spiegelberg, Jakob
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Materialteori.
    Signal Processing Tools for Electron Microscopy2018Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    The detection of weak signals in noisy data is a problem which occurs across various disciplines. Here, the signal of interest is the spectral signature of the electron magnetic chiral dichroism (EMCD) effect. In principle, EMCD allows for the measurement of local magnetic structures in the electron microscope, its spatial resolution, versatility and low hardware requirements giving it an eminent position among competing measurement techniques. However, experimental shortcomings as well as intrinsically low signal to noise ratio render its measurement challenging to the present day.   

    This thesis explores how posterior data processing may aid the analysis of various data from the electron microscope. Following a brief introduction to different signals arising in the microscope and a yet briefer survey of the state of the art of EMCD measurements, noise removal strategies are presented. Afterwards, gears are shifted to discuss the separation of mixed signals into their physically meaningful source components based on their assumed mathematical characteristics, so called blind source separation (BSS).    

    A data processing workflow for detecting weak signals in noisy spectra is derived from these considerations, ultimately culminating in several demonstrations of the extraction of EMCD signals. While the focus of the thesis does lie on data processing strategies for EMCD detection, the approaches presented here are similarly applicable in other situations. Related topics such as the general analysis of hyperspectral images using BSS methods or the fast analysis of large data sets are also discussed.

    Delarbeten
    1. Detecting magnetic ordering with atomic size electron probes
    Öppna denna publikation i ny flik eller fönster >>Detecting magnetic ordering with atomic size electron probes
    Visa övriga...
    2016 (Engelska)Ingår i: Advanced Structural and Chemical ImagingArtikel i tidskrift (Refereegranskat) Published
    Nationell ämneskategori
    Fysik
    Identifikatorer
    urn:nbn:se:uu:diva-348236 (URN)
    Tillgänglig från: 2018-04-11 Skapad: 2018-04-11 Senast uppdaterad: 2018-04-11
    2. Magnetic measurements with atomic-plane resolution
    Öppna denna publikation i ny flik eller fönster >>Magnetic measurements with atomic-plane resolution
    Visa övriga...
    2016 (Engelska)Ingår i: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 7, artikel-id 12672Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Rapid development of magnetic nanotechnologies calls for experimental techniques capable of providing magnetic information with subnanometre spatial resolution. Available probes of magnetism either detect only surface properties, such as spin-polarized scanning tunnelling microscopy, magnetic force microscopy or spin-polarized low-energy electron microscopy, or they are bulk probes with limited spatial resolution or quantitativeness, such as X-ray magnetic circular dichroism or classical electron magnetic circular dichroism (EMCD). Atomic resolution EMCD methods have been proposed, although not yet experimentally realized. Here, we demonstrate an EMCD technique with an atomic size electron probe utilizing a probe-corrected scanning transmission electron microscope in its standard operation mode. The crucial element of the method is a ramp in the phase of the electron beam wavefunction, introduced by a controlled beam displacement. We detect EMCD signals with atomic-plane resolution, thereby bringing near-atomic resolution magnetic circular dichroism spectroscopy to hundreds of laboratories worldwide.

    Nationell ämneskategori
    Fysik
    Identifikatorer
    urn:nbn:se:uu:diva-315933 (URN)10.1038/ncomms12672 (DOI)000391876300001 ()27578421 (PubMedID)
    Forskningsfinansiär
    VetenskapsrådetGöran Gustafssons Stiftelse för främjande av vetenskaplig forskning vid Uppsala universitet och Kungl tekniska högskolan (UU/KTH)Knut och Alice Wallenbergs Stiftelse, 2015.0060Stiftelsen för internationalisering av högre utbildning och forskning (STINT)
    Tillgänglig från: 2017-02-22 Skapad: 2017-02-22 Senast uppdaterad: 2018-04-11Bibliografiskt granskad
    3. Can we use PCA to detect small signals in noisy data?
    Öppna denna publikation i ny flik eller fönster >>Can we use PCA to detect small signals in noisy data?
    2017 (Engelska)Ingår i: UltramicroscopyArtikel i tidskrift (Refereegranskat) Published
    Nationell ämneskategori
    Fysik
    Identifikatorer
    urn:nbn:se:uu:diva-348242 (URN)
    Tillgänglig från: 2018-04-11 Skapad: 2018-04-11 Senast uppdaterad: 2018-04-11
    4. Analysis of electron energy loss spectroscopy data using geometric extraction methods
    Öppna denna publikation i ny flik eller fönster >>Analysis of electron energy loss spectroscopy data using geometric extraction methods
    2017 (Engelska)Ingår i: Ultramicroscopy, ISSN 0304-3991, E-ISSN 1879-2723, Vol. 174, s. 14-26Artikel i tidskrift (Refereegranskat) Published
    Nationell ämneskategori
    Atom- och molekylfysik och optik Teknik och teknologier
    Identifikatorer
    urn:nbn:se:uu:diva-328271 (URN)10.1016/j.ultramic.2016.12.014 (DOI)000403342200003 ()28012371 (PubMedID)
    Forskningsfinansiär
    VetenskapsrådetStiftelsen för internationalisering av högre utbildning och forskning (STINT)Göran Gustafssons Stiftelse för främjande av vetenskaplig forskning vid Uppsala universitet och Kungl tekniska högskolan (UU/KTH)
    Tillgänglig från: 2016-12-16 Skapad: 2017-12-20 Senast uppdaterad: 2018-04-11Bibliografiskt granskad
    5. Tensor decompositions for the analysis of atomic resolution electron energy loss spectra
    Öppna denna publikation i ny flik eller fönster >>Tensor decompositions for the analysis of atomic resolution electron energy loss spectra
    2017 (Engelska)Ingår i: Ultramicroscopy, ISSN 0304-3991, E-ISSN 1879-2723, Vol. 175, s. 36-45Artikel i tidskrift (Refereegranskat) Published
    Nationell ämneskategori
    Atom- och molekylfysik och optik
    Identifikatorer
    urn:nbn:se:uu:diva-329139 (URN)10.1016/j.ultramic.2016.12.025 (DOI)000403342500003 ()28110262 (PubMedID)
    Forskningsfinansiär
    VetenskapsrådetGöran Gustafssons Stiftelse för främjande av vetenskaplig forskning vid Uppsala universitet och Kungl tekniska högskolan (UU/KTH)Stiftelsen för internationalisering av högre utbildning och forskning (STINT)
    Tillgänglig från: 2017-01-11 Skapad: 2017-10-10 Senast uppdaterad: 2018-04-11Bibliografiskt granskad
    6. Localization of magnetic circular dichroic spectra in transmission electron microscopy experiments with atomic plane resolution
    Öppna denna publikation i ny flik eller fönster >>Localization of magnetic circular dichroic spectra in transmission electron microscopy experiments with atomic plane resolution
    Visa övriga...
    2017 (Engelska)Ingår i: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 95, nr 17, artikel-id 174412Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Inelastic electron scattering is a consequence of mostly Coulomb interaction between electrons in the sample and electron beam and, as such, it is a nonlocal event. In atomic resolution experiments, it thus opens the following question: How far is the origin of the inelastic scattering signal that is observed when the electron beam is passing nearby an atomic column or plane? We analyze computationally the delocalization of the magnetic signal in electron magnetic circular dichroism (EMCD) experiments in the so-called three-beam orientation, allowing one to image individual atomic planes. We compare the classical EMCD setup using the double-difference procedure (DD-EMCD) to a recently introduced atomic plane resolution EMCD (APR-EMCD) geometry, assuming the same probe size. We observe a strong localization of the EMCD signal to the closest atomic plane, confirming the potential of EMCD to study an evolution of magnetic properties near surfaces or interfaces with atomic plane resolution. The localization of the EMCD signal is remarkably higher than the localization of the nonmagnetic component of the inelastic scattering cross section. We also analyze double-channeling effects and find them particularly strong for the DD-EMCD method, while for APR-EMCD they appear to be minor. The DD-EMCD signal, on the other hand, appears to be more robust with respect to sample thickness than that of the APR-EMCD.

    Ort, förlag, år, upplaga, sidor
    AMER PHYSICAL SOC, 2017
    Nationell ämneskategori
    Fysik Teknik och teknologier
    Identifikatorer
    urn:nbn:se:uu:diva-325336 (URN)10.1103/PhysRevB.95.174412 (DOI)000401223700004 ()
    Forskningsfinansiär
    VetenskapsrådetGöran Gustafssons stiftelse för naturvetenskaplig och medicinsk forskning (KVA)
    Tillgänglig från: 2017-06-30 Skapad: 2017-06-30 Senast uppdaterad: 2018-04-11Bibliografiskt granskad
    7. Towards sub-nanometer real-space observation of spin and orbital magnetism at the Fe/MgO interface
    Öppna denna publikation i ny flik eller fönster >>Towards sub-nanometer real-space observation of spin and orbital magnetism at the Fe/MgO interface
    Visa övriga...
    2017 (Engelska)Ingår i: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, artikel-id 44802Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    While the performance of magnetic tunnel junctions based on metal/oxide interfaces is determined by hybridization, charge transfer, and magnetic properties at the interface, there are currently only limited experimental techniques with sufficient spatial resolution to directly observe these effects simultaneously in real-space. In this letter, we demonstrate an experimental method based on Electron Magnetic Circular Dichroism (EMCD) that will allow researchers to simultaneously map magnetic transitions and valency in real-space over interfacial cross-sections with sub-nanometer spatial resolution. We apply this method to an Fe/MgO bilayer system, observing a significant enhancement in the orbital to spin moment ratio that is strongly localized to the interfacial region. Through the use of first-principles calculations, multivariate statistical analysis, and Electron Energy-Loss Spectroscopy (EELS), we explore the extent to which this enhancement can be attributed to emergent magnetism due to structural confinement at the interface. We conclude that this method has the potential to directly visualize spin and orbital moments at buried interfaces in magnetic systems with unprecedented spatial resolution.

    Ort, förlag, år, upplaga, sidor
    NATURE PUBLISHING GROUP, 2017
    Nationell ämneskategori
    Atom- och molekylfysik och optik Teknik och teknologier
    Identifikatorer
    urn:nbn:se:uu:diva-320197 (URN)10.1038/srep44802 (DOI)000397288700001 ()28338011 (PubMedID)
    Forskningsfinansiär
    Vetenskapsrådet, C0367901Stiftelsen för internationalisering av högre utbildning och forskning (STINT), IG2009-2017Knut och Alice Wallenbergs Stiftelse, 2013.0020 2012.0031eSSENCE - An eScience Collaboration
    Tillgänglig från: 2017-04-18 Skapad: 2017-04-18 Senast uppdaterad: 2018-04-11Bibliografiskt granskad
    8. The usage of data compression for the background estimation of electron energy loss spectra
    Öppna denna publikation i ny flik eller fönster >>The usage of data compression for the background estimation of electron energy loss spectra
    2017 (Engelska)Ingår i: Ultramicroscopy, ISSN 0304-3991, E-ISSN 1879-2723, Vol. 181, s. 117-122Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Quantitative analysis of noisy electron spectrum images requires a robust estimation of the underlying background signal. We demonstrate how modern data compression methods can be used as a tool for achieving an analysis result less affected by statistical errors or to speed up the background estimation. In particular, we demonstrate how a multilinear singular value decomposition (MLSVD) can be used to enhance elemental maps obtained from a complex sample measured with energy electron loss spectroscopy. Furthermore, the usage of vertex component analysis (VCA) for a basis vector centered estimation of the background is demonstrated. Arising computational benefits in terms of model accuracy and computational costs are studied.

    Ort, förlag, år, upplaga, sidor
    ELSEVIER SCIENCE BV, 2017
    Nationell ämneskategori
    Fysik Teknik och teknologier
    Identifikatorer
    urn:nbn:se:uu:diva-336443 (URN)10.1016/j.ultramic.2017.05.017 (DOI)000411170800014 ()28549246 (PubMedID)
    Forskningsfinansiär
    VetenskapsrådetStiftelsen för internationalisering av högre utbildning och forskning (STINT)Göran Gustafssons stiftelse för naturvetenskaplig och medicinsk forskning (KVA)
    Tillgänglig från: 2017-12-14 Skapad: 2017-12-14 Senast uppdaterad: 2018-04-11Bibliografiskt granskad
    9. Fully nonlocal inelastic scattering computations for spectroscopical transmission electron microscopy methods
    Öppna denna publikation i ny flik eller fönster >>Fully nonlocal inelastic scattering computations for spectroscopical transmission electron microscopy methods
    2017 (Engelska)Ingår i: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 96, nr 24, artikel-id 245121Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    The complex interplay of elastic and inelastic scattering amenable to different levels of approximation constitutes the major challenge for the computation and hence interpretation of TEM-based spectroscopical methods. The two major approaches to calculate inelastic scattering cross sections of fast electrons on crystals—Yoshioka-equations-based forward propagation and the reciprocal wave method—are founded in two conceptually differing schemes—a numerical forward integration of each inelastically scattered wave function, yielding the exit density matrix, and a computation of inelastic scattering matrix elements using elastically scattered initial and final states (double channeling). Here, we compare both approaches and show that the latter is computationally competitive to the former by exploiting analytical integration schemes over multiple excited states. Moreover, we show how to include full nonlocality of the inelastic scattering event, neglected in the forward propagation approaches, at no additional computing costs in the reciprocal wave method. Detailed simulations show in some cases significant errors due to the z-locality approximation and hence pitfalls in the interpretation of spectroscopical TEM results.

    Nationell ämneskategori
    Den kondenserade materiens fysik
    Identifikatorer
    urn:nbn:se:uu:diva-339794 (URN)10.1103/PhysRevB.96.245121 (DOI)000417831800004 ()
    Forskningsfinansiär
    VetenskapsrådetGöran Gustafssons stiftelse för naturvetenskaplig och medicinsk forskning (KVA)EU, Horisont 2020, 715620
    Tillgänglig från: 2018-02-23 Skapad: 2018-02-23 Senast uppdaterad: 2018-04-11Bibliografiskt granskad
    10. Unmixing hyperspectral data by using signal subspace sampling
    Öppna denna publikation i ny flik eller fönster >>Unmixing hyperspectral data by using signal subspace sampling
    Visa övriga...
    2017 (Engelska)Ingår i: Ultramicroscopy, ISSN 0304-3991, E-ISSN 1879-2723, Vol. 182, s. 205-211Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    This paper demonstrates how Signal Subspace Sampling (SSS) is an effective pre-processing step for Non-negative Matrix Factorization (NMF) or Vertex Component Analysis (VCA). The approach allows to uniquely extract non-negative source signals which are orthogonal in at least one observation channel, respectively. It is thus well suited for processing hyperspectral images from X-ray microscopy, or other emission spectroscopies, into its non-negative source components. The key idea is to resample the given data so as to satisfy better the necessity and sufficiency conditions for the subsequent NMF or VCA. Results obtained both on an artificial simulation study as well as based on experimental data from electronmicroscopy are reported. 

    Ort, förlag, år, upplaga, sidor
    ELSEVIER SCIENCE BV, 2017
    Nationell ämneskategori
    Data- och informationsvetenskap
    Identifikatorer
    urn:nbn:se:uu:diva-340709 (URN)10.1016/j.ultramic.2017.07.009 (DOI)000413436500026 ()28711769 (PubMedID)
    Forskningsfinansiär
    VetenskapsrådetKnut och Alice Wallenbergs Stiftelse, 2015.0060
    Tillgänglig från: 2018-02-02 Skapad: 2018-02-02 Senast uppdaterad: 2018-04-11Bibliografiskt granskad
    11. Local low rank denoising for enhanced atomic resolution imaging
    Öppna denna publikation i ny flik eller fönster >>Local low rank denoising for enhanced atomic resolution imaging
    Visa övriga...
    2018 (Engelska)Ingår i: UltramicroscopyArtikel i tidskrift (Refereegranskat) Published
    Nationell ämneskategori
    Fysik
    Identifikatorer
    urn:nbn:se:uu:diva-348246 (URN)
    Tillgänglig från: 2018-04-11 Skapad: 2018-04-11 Senast uppdaterad: 2018-04-11
    12. On the usage of ICA for the analysis of EELS and EDX data
    Öppna denna publikation i ny flik eller fönster >>On the usage of ICA for the analysis of EELS and EDX data
    (Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
    Nationell ämneskategori
    Fysik
    Identifikatorer
    urn:nbn:se:uu:diva-348251 (URN)
    Tillgänglig från: 2018-04-11 Skapad: 2018-04-11 Senast uppdaterad: 2018-04-11
    13. Low dose STEM imaging via inpainting of regularly undersampledimages
    Öppna denna publikation i ny flik eller fönster >>Low dose STEM imaging via inpainting of regularly undersampledimages
    (Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
    Nationell ämneskategori
    Fysik
    Identifikatorer
    urn:nbn:se:uu:diva-348253 (URN)
    Tillgänglig från: 2018-04-11 Skapad: 2018-04-11 Senast uppdaterad: 2018-04-11
    14. Real space mapping of magnetism at atomic resolution using APR-EMCD
    Öppna denna publikation i ny flik eller fönster >>Real space mapping of magnetism at atomic resolution using APR-EMCD
    (Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
    Nationell ämneskategori
    Fysik
    Identifikatorer
    urn:nbn:se:uu:diva-348257 (URN)
    Tillgänglig från: 2018-04-11 Skapad: 2018-04-11 Senast uppdaterad: 2018-04-11
    15. Blind identification of magnetic signals in electron magnetic chiral dichroism using independent component analysis
    Öppna denna publikation i ny flik eller fönster >>Blind identification of magnetic signals in electron magnetic chiral dichroism using independent component analysis
    Visa övriga...
    (Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
    Nationell ämneskategori
    Fysik
    Identifikatorer
    urn:nbn:se:uu:diva-348259 (URN)
    Tillgänglig från: 2018-04-11 Skapad: 2018-04-11 Senast uppdaterad: 2018-04-11
    16. Data fusion approaches for electron microscopy
    Öppna denna publikation i ny flik eller fönster >>Data fusion approaches for electron microscopy
    Visa övriga...
    (Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
    Nationell ämneskategori
    Fysik
    Identifikatorer
    urn:nbn:se:uu:diva-348262 (URN)
    Tillgänglig från: 2018-04-11 Skapad: 2018-04-11 Senast uppdaterad: 2018-04-11